Replied 27 May 2021, 2:18 am EST
Hey all, thanks for reporting this issue.
Unfortunately, this seems to be a repaint bug in Safari. The good news is that I made a workaround for now. Feel free to use this fix for the time being.
Ideally this bug is fixed in Safari, but if not, we will have to decide whether to put this (ugly) hack into our own code or not. We are attempting to get this resolved with the Safari team.
I made a sample to demonstrate the issue and the fix. You can test it yourself here: https://safari-14-1-scroll-hack.stackblitz.io
And if you want to see the code for this sample, its here: https://stackblitz.com/edit/safari-14-1-scroll-hack