Please note: After update from Joomla 6.0.x to Joomla 6.1, some of the events are shifted in time by 2 hours (increment). This occurs on most of the future (!) events only. Maybe the 2 hours have something to do in my case with Middle European Summer Time (MEST) that is 2 hours ahead of UTC.
Occurs on repeted events with and without exceptions. It seems not to occur on single events but I have only very few (bad statistics).