Sorry this frustrating issue is still happening. Since I wasn’t able to replicate it, I’d point you back to this:
I’d say you need to update The Events Calendar. If that doesn’t work, please disable Give and Sharify (which you said you already did). If that doesn’t work, deactivate all other non-Modern Tribe plugins and use a WordPress default theme, and test again.
Please do this to complete your testing.
Of course, we always recommend restorable database and file backups before modifying anything on your site. It’s also advisable to do troubleshooting via a staging/development copy of your site instead of having to deactivate plugins/theme on your live site just for a quick test.