I think it is happening less and less, it was more in the older days. I'm still on very old install (from somewhere barely after the OwnCloud split), so I saw some issues.

Of course, just before I was ready to wipe it all and start with the AIO container my partner started intensively using the calendar (switching from paper, finally!) So I need to spend some time with it and migrate properly without her having any downsides. When I do I will also set up EuroOffice and experiment with that. I'm rather looking forward to that. In that sense it's a real "lab" :)