Many lines of warning messages after docker update

I have collabora/code docker which is working fine with nextcloud. Following the update of collabora/code docker today, I get many lines of warnings:

kit-00043-00052 2018-07-02 06:24:36.690936 [ lokit_002 ] WRN Waking up dead poll thread [kit], started: false, finished: false| ./net/Socket.hpp:550
wsd-00028-00029 2018-07-02 06:24:36.706472 [ prisoner_poll ] WRN Waking up dead poll thread [docbroker_002], started: true, finished: true| ./net/Socket.hpp:550

Also,

wsd-00028-00075 2018-07-02 06:27:39.272262 [ docbroker_004 ] WRN Missing JSON property [WatermarkText]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.272358 [ docbroker_004 ] WRN Missing JSON property [HidePrintOption]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.272397 [ docbroker_004 ] WRN Missing JSON property [HideSaveOption]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.272436 [ docbroker_004 ] WRN Missing JSON property [HideExportOption]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.272487 [ docbroker_004 ] WRN Missing JSON property [EnableOwnerTermination]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.272519 [ docbroker_004 ] WRN Missing JSON property [DisablePrint]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.272551 [ docbroker_004 ] WRN Missing JSON property [DisableExport]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.272579 [ docbroker_004 ] WRN Missing JSON property [DisableCopy]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.272626 [ docbroker_004 ] WRN Missing JSON property [DisableInactiveMessages]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.272711 [ docbroker_004 ] WRN Missing JSON property [DisableChangeTrackingRecord]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.273513 [ docbroker_004 ] WRN Missing JSON property [DisableChangeTrackingShow]| wsd/Storage.cpp:422
wsd-00028-00075 2018-07-02 06:27:39.273554 [ docbroker_004 ] WRN Missing JSON property [HideChangeTrackingControls]| wsd/Storage.cpp:422
kit-00059-00079 2018-07-02 06:27:39.421821 [ lokit_004 ] WRN Waking up dead poll thread [kit], started: false, finished: false|

and

[ websrv_poll ] WRN client - server version mismatch, disabling browser cache.

Despite the warnings, code is working fine.

I would appreciate clarification on this. Thanks.