fullcalendar: refetchEvents triggers scroll reset in month view

Using fullcalendar 5.10.1 I experienced an issue which sounds a lot like #3153 (which was fixed in 2.8.0), so this might be a regression.

Reduced Test Case

I adapted the old test case to the current version of fullcalendar: https://jsfiddle.net/q63vg8oa/

Bug Description

• steps to reproduce
  • open the dayGridMonth View
  • add several events to the same day (so that the row needs to expand)
  • scroll down
  • call refetchEvents()
• expected result
  • the scroll position remains the same
• what happens instead?
  • scroll position is moved up

I guess this happens because the events are temporarily removed, so the row gets smaller and the scroll position needs to adjust. When the events are added again the row expands again, but the scroll position remains the same.