Multiple bugs after last update

After just updating to the newest version and upon visiting my calendar page, I encountered multiple very strange bugs.

First all my dates are listed in a calendar view without Month separations (usually it’s just January, then just February, now it’s one after another until year 2100 when my recurring events stop). Even though I specify to show me only events in January 2023, it shows me all events in a never ending list of calendar boxes.

And second, after I click on an event, it’s name hijacks every title on the website – all my menu links and article links transform to the name of the event whose page I’m on. Also I believe some of the styling has changed, like a background color, but not 100% positive on that.