I have a similar problem, where a date, in one specific timeslot is shown on the wrong date in the calendar view.
The date shown in the details is correct, I suspect this is some renderding problem.
It only happens with very specific setting, in my case 12:15 thursday, duration 1:45, only in one workspace. very strangeā¦ if I change it to 12:16 it's shown on friday instead on thursday, with 12:17 it's shown correcltly, very very strangeā¦