It’s a duplicate of #186
Yes, we know of this. It is caused by another library we use and which already had a fix for it, but in it’s current master the bug appeared again (and we used the master for the latest DAVdroid). You need to wait until we release 0.8.4 or (as you said downgrade temporarily).
Keep in mind that only the display is wrong - the bug appears based on the day where we are right now. This probably won’t show wrong again tomorrow or in some more days.