non-proprietary users are unable to create / modify events on the shared calendar
steps to reproduce
with user A create a calendar
share the calendar to LDAP user B
User A can see 2 time the shared calendar line to User B (the first one with write permission and se second without; in the table oc_dav_shares we can find 2 record one with access = 2 and resourceid = display name the other with access=3 and resource id = user id)
User B cannot delete add or modify events
We also opened it at github … but no response at all
Good that the github issue already exists, than anyone who has valuable information on this can go right there. Please be patient - if right now nobody answers there, then maybe because nobody else had the same problem, or the time and skills to dive deeper into it.
I still will leave this topic open though, so the issue has some attention on central too. People should of course answer on github, if they have information on this, but if this isn’t possible for some reason, they should be able to answer here, too.