LibreOffice online destroys document while there are still active sessions

LibreOffice version: 6.3.2
Online version: cp-4.0.7-1

Log:

paź 05 10:41:30 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:30.748137 [ docbroker_001 ] INF Could not open /var/cache/loolwsd/5/8/5/e86c622f
a75583ef0178a46a38e82b5ee2c3c/cmdValues.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840.txt| wsd/TileCache.cpp:279
paź 05 10:41:34 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:34.233050 [ docbroker_001 ] DBG Doc [/index.php/apps/richdocuments/wopi/files/95
9_ocfdfulunonx] added sent: 487651 recv: 25397 bytes to totals| wsd/DocumentBroker.cpp:303
paź 05 10:41:36 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:36.625711 [ docbroker_001 ] INF ToClient-0046 Disconnected, current number of co
nnections: 2| wsd/ClientSession.cpp:1180
paź 05 10:41:36 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:36.625792 [ docbroker_001 ] DBG ToClient-0046 on docKey [/index.php/apps/richdoc
uments/wopi/files/959_ocfdfulunonx] terminated. Cleaning up.| wsd/ClientSession.cpp:1190
paź 05 10:41:36 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:36.625833 [ docbroker_001 ] INF Removing session [0046] on docKey [/index.php/ap
ps/richdocuments/wopi/files/959_ocfdfulunonx]. Have 2 sessions. markToDestroy: false, LastEditableSession: false| wsd/DocumentBroker.cpp:1205
paź 05 10:41:36 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:36.625928 [ docbroker_001 ] DBG Removing socket #28 (of 3) from docbroker_001| .
/net/Socket.hpp:577
paź 05 10:41:36 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:36.625947 [ docbroker_001 ] DBG StreamSocket dtor #28| ./net/Socket.hpp:797
paź 05 10:41:36 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:36.625967 [ docbroker_001 ] INF ~ClientSession dtor [ToClient-0046], current num
ber of connections: 1| wsd/ClientSession.cpp:64
paź 05 10:41:36 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:36.626998 [ lokit_001 ] DBG Removing ChildSession [0046].| kit/Kit.cpp:1830
paź 05 10:41:36 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:36.627177 [ lokit_001 ] DBG Have 1 child after removing ChildSession [0046].| ki
t/Kit.cpp:1834
paź 05 10:41:36 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:36.627339 [ lokit_001 ] INF ~ChildSession dtor [ToMaster-0046].| kit/ChildSessio
n.cpp:81
paź 05 10:41:36 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:36.627499 [ lokit_001 ] INF Unloading session [0046] on url [/index.php/apps/ric
hdocuments/wopi/files/959_ocfdfulunonx].| kit/Kit.cpp:1436
paź 05 10:41:36 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:36.627857 [ lokit_001 ] INF Document [/index.php/apps/richdocuments/wopi/files/9
59_ocfdfulunonx] has no more views, but has 1 sessions still. Destroying the document.| kit/Kit.cpp:1465
paź 05 10:41:36 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:36.646396 [ lokit_001 ] INF Document [/index.php/apps/richdocuments/wopi/files/9
59_ocfdfulunonx] session [0046] unloaded Document.| kit/Kit.cpp:1467
paź 05 10:41:36 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:36.646654 [ lokit_001 ] ERR No socket associated with WebSocketHandler 0x561d3d5
8aa40| ./net/WebSocketHandler.hpp:125
paź 05 10:41:38 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:38.292343 [ docbroker_001 ] INF Could not open /var/cache/loolwsd/5/8/5/e86c622f
a75583ef0178a46a38e82b5ee2c3c/cmdValues.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840.txt| wsd/TileCache.cpp:279
paź 05 10:41:38 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:38.293587 [ lokit_001 ] ERR Document [/index.php/apps/richdocuments/wopi/files/9
59_ocfdfulunonx] is not loaded.| kit/Kit.cpp:2058
paź 05 10:41:38 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:38.293756 [ lokit_001 ] ERR Session::handleInput: Exception while handling [comm
andvalues command=.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840]: Document /index.php/apps/richdocuments/wopi/files
/959_ocfdfulunonx is not loaded.| common/Session.cpp:237
paź 05 10:41:39 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:39.035326 [ docbroker_001 ] INF Could not open /var/cache/loolwsd/5/8/5/e86c622f
a75583ef0178a46a38e82b5ee2c3c/cmdValues.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840.txt| wsd/TileCache.cpp:279
paź 05 10:41:39 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:39.035855 [ lokit_001 ] ERR Document [/index.php/apps/richdocuments/wopi/files/9
59_ocfdfulunonx] is not loaded.| kit/Kit.cpp:2058
paź 05 10:41:39 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:39.035980 [ lokit_001 ] ERR Session::handleInput: Exception while handling [comm
andvalues command=.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840]: Document /index.php/apps/richdocuments/wopi/files
/959_ocfdfulunonx is not loaded.| common/Session.cpp:237
paź 05 10:41:39 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:39.761509 [ docbroker_001 ] DBG Doc [/index.php/apps/richdocuments/wopi/files/95
9_ocfdfulunonx] added sent: 285182 recv: 14614 bytes to totals| wsd/DocumentBroker.cpp:303
paź 05 10:41:39 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:39.782629 [ docbroker_001 ] INF Could not open /var/cache/loolwsd/5/8/5/e86c622f
a75583ef0178a46a38e82b5ee2c3c/cmdValues.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840.txt| wsd/TileCache.cpp:279
paź 05 10:41:39 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:39.783023 [ lokit_001 ] ERR Document [/index.php/apps/richdocuments/wopi/files/9
59_ocfdfulunonx] is not loaded.| kit/Kit.cpp:2058
paź 05 10:41:39 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:39.783109 [ lokit_001 ] ERR Session::handleInput: Exception while handling [comm
andvalues command=.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840]: Document /index.php/apps/richdocuments/wopi/files
/959_ocfdfulunonx is not loaded.| common/Session.cpp:237
paź 05 10:41:40 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:40.540886 [ docbroker_001 ] INF Could not open /var/cache/loolwsd/5/8/5/e86c622f
a75583ef0178a46a38e82b5ee2c3c/cmdValues.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840.txt| wsd/TileCache.cpp:279
paź 05 10:41:40 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:40.541140 [ lokit_001 ] ERR Document [/index.php/apps/richdocuments/wopi/files/9
59_ocfdfulunonx] is not loaded.| kit/Kit.cpp:2058
paź 05 10:41:40 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:40.541222 [ lokit_001 ] ERR Session::handleInput: Exception while handling [comm
andvalues command=.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840]: Document /index.php/apps/richdocuments/wopi/files
/959_ocfdfulunonx is not loaded.| common/Session.cpp:237
paź 05 10:41:41 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:41.300783 [ docbroker_001 ] INF Could not open /var/cache/loolwsd/5/8/5/e86c622f
a75583ef0178a46a38e82b5ee2c3c/cmdValues.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840.txt| wsd/TileCache.cpp:279
paź 05 10:41:41 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:41.300994 [ lokit_001 ] ERR Document [/index.php/apps/richdocuments/wopi/files/9
59_ocfdfulunonx] is not loaded.| kit/Kit.cpp:2058
paź 05 10:41:41 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:41.301072 [ lokit_001 ] ERR Session::handleInput: Exception while handling [comm
andvalues command=.uno:CellCursor?outputHeight=256&outputWidth=256&tileHeight=3840&tileWidth=3840]: Document /index.php/apps/richdocuments/wopi/files
/959_ocfdfulunonx is not loaded.| common/Session.cpp:237
paź 05 10:41:41 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:41.326192 [ docbroker_001 ] INF ToClient-0014 Disconnected, current number of co
nnections: 1| wsd/ClientSession.cpp:1180
paź 05 10:41:41 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:41.326295 [ docbroker_001 ] DBG ToClient-0014 on docKey [/index.php/apps/richdoc
uments/wopi/files/959_ocfdfulunonx] terminated. Cleaning up.| wsd/ClientSession.cpp:1190
paź 05 10:41:41 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:41.326367 [ docbroker_001 ] INF Removing session [0014] on docKey [/index.php/ap
ps/richdocuments/wopi/files/959_ocfdfulunonx]. Have 1 sessions. markToDestroy: true, LastEditableSession: true| wsd/DocumentBroker.cpp:1205
paź 05 10:41:41 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:41.326403 [ docbroker_001 ] INF Saving doc [/index.php/apps/richdocuments/wopi/f
iles/959_ocfdfulunonx].| wsd/DocumentBroker.cpp:1053
paź 05 10:41:41 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:41.326543 [ lokit_001 ] ERR Document [/index.php/apps/richdocuments/wopi/files/9
59_ocfdfulunonx] is not loaded.| kit/Kit.cpp:2058
paź 05 10:41:41 cloud loolwsd[76]: kit-00539-00570 2019-10-05 08:41:41.326616 [ lokit_001 ] ERR Session::handleInput: Exception while handling [uno
.uno:Save {“DontTerminateEdit”:{“type”:“boolean”,“value”:true},“DontSaveIfUnmodified”:{“type”:“boolean”,“value”:true}}]: Document /index.php/apps/ric
hdocuments/wopi/files/959_ocfdfulunonx is not loaded.| common/Session.cpp:237
paź 05 10:41:41 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:41.327208 [ docbroker_001 ] DBG Removing socket #24 (of 2) from docbroker_001| .
/net/Socket.hpp:577
paź 05 10:41:41 cloud loolwsd[76]: wsd-00076-00568 2019-10-05 08:41:41.327243 [ docbroker_001 ] DBG StreamSocket dtor #24| ./net/Socket.hpp:797

Have anyone a clue why?