Just one problem noted so far, likely related to this OS update.
Yesterday (18/07, so one day after the update) the Proton Drive app on my phone, which I hadn’t used since the update, started to misbehave. After launching it, before I could log in, it crashed and restarted, repeatedly. After quitting the app, repeated error messages “Proton Drive keeps stopping”.
A reboot of the phone, emptying the app cache, didn’t help. I was able to fix the problem by reinstalling the app, following prompt advice from Proton support team.