@sven.schatter , hey!
Jira team had raised internal issue in platform component and we inform the Confluence team about the impact and the issue. Thus, the other product teams will be informed about the issue.
At this point I can not update on how other affected Server products are tracking the issue - I’ll post a link for a correspondent threads/issues when I got ones.
You may find the description on the Jira Server bug useful and try applying workaround described there for the Confluence Server.
Unless you seek Confluence-specific advice at this point I don’t see a need to raise a separate issue with a DEVHELP.
Best regards,
Ignat Alexeyenko
Senior Engineer at Jira Server