It looks like this could be related to Re-add full ics export - #9 by kelv because 100 events seem to show, then after about 2 minutes can display another large batch, and they don’t appear gradually but in large chunks.
Edit: This rate-limited behaviour is manageable for now, but becomes apparent when advancing far; i can see all the events for my current week and all the events in the next, it’s if i then proceed to the next week i hit the hard limit.