Unless there already exists a thread with listed iOS problems I thought this one could be used to list general issues.

End users have reported many cases of the load screen freezing on iOS 14-14.2.1, mainly through Chrome but also Safari. One user reported the same happening when launching through the Facebook app. For some users, but not all, this was fixed through a new build with the latest update patch 292.29.
This build is in Final project mode, with HTML file, single source file and grouped images.

Is there a fool proof way to avoid problems with html5 exports on iOS?