Nextcloud 15.0.4 DELETE /remote.php/dav/calendars/ Calendars erased.. bug?

Hello,

i got a Problem with Nextcloud Calendar:… see the following log attached and anoymized:

2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:17 +0100] “REPORT /remote.php/dav/calendars/user123XX/demo/ HTTP/1.1” 207 695 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 972 1390
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:18 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/inbox/ HTTP/1.1” 207 415 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 906 1466
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:18 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/inbox/ HTTP/1.1” 207 415 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 870 1466
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:20 +0100] “DELETE /remote.php/dav/calendars/user123XX/demo/ HTTP/1.1” 401 557 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 1138 1486
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:21 +0100] “DELETE /remote.php/dav/calendars/user123XX/demo/ HTTP/1.1” 204 - “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 905 807
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:25 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/ HTTP/1.1” 401 557 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 3453 1486
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:25 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/ HTTP/1.1” 207 16842 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 3220 18243
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:26 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/inbox/ HTTP/1.1” 207 415 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 906 1466
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:26 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/inbox/ HTTP/1.1” 207 415 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 870 1466
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:32 +0100] “DELETE /remote.php/dav/calendars/user123XX/calendar177/ HTTP/1.1” 401 557 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 1139 1486
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:32 +0100] “DELETE /remote.php/dav/calendars/user123XX/calendar177/ HTTP/1.1” 204 - “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 906 807
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:32 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/ HTTP/1.1” 401 557 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 2886 1311
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:33 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/ HTTP/1.1” 207 13930 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 3504 15339
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:33 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/inbox/ HTTP/1.1” 207 415 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 906 1466
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:33 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/inbox/ HTTP/1.1” 207 415 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 870 1466
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:45 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/ HTTP/1.1” 401 557 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 3453 1486
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:45 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/ HTTP/1.1” 207 13930 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 3220 15324
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:45 +0100] “PUT /remote.php/dav/calendars/user123XX/calendar29992/xxxxxxxxxxxxxxx.ics HTTP/1.1” 204 - “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 1172 734
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:46 +0100] “REPORT /remote.php/dav/calendars/user123XX/calendar29992/ HTTP/1.1” 207 700 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 977 1395
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:46 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/inbox/ HTTP/1.1” 207 415 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 906 1466
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:46 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/inbox/ HTTP/1.1” 207 415 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 870 1466
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:48 +0100] “DELETE /remote.php/dav/calendars/user123XX/calendar29992/ HTTP/1.1” 401 557 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 1144 1486
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:49 +0100] “DELETE /remote.php/dav/calendars/user123XX/calendar29992/ HTTP/1.1” 204 - “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 911 807
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:49 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/ HTTP/1.1” 401 557 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 2886 1311
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:49 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/ HTTP/1.1” 207 11010 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 3220 12403
2a01:XXX:XXX:XXX:XXX:XXX:XXX:XXX:FE - - [17/Mar/2XXX:XX:X5:50 +0100] “PROPFIND /remote.php/dav/calendars/user123XX/inbox/ HTTP/1.1” 207 415 “-” “iOS/12.1.4 (APPLE-APPLE-ID) dataaccessd/1.0” 906 1466