I also experience connectivity issues with my WiFi, and it’s not router dependent for sure because it happens in multiple different places.
In a few words: almost every time when I unlock my phone there is no connectivity in all my social/banking/taxi/music apps for 10-15 seconds, then connection establishes, sometimes it’s just enough to lock the phone, wait for 3-4 minutes, unlock and see the issue again. Doesn’t happen on other phones in the family (my former OnePlus and Iphone). It’s getting annoying because you can’t use your phone ‘straight out of the pocket’, you always experience a ‘connectivity delay’
I think only WiFi is affected, it’s shameful for a 800 euro phone to have such an issue for more than a month! I reported it multiple times, last time with the wifi logs, support wasn’t helpful at all (they asked me to erase all my data ,lol, what a shame (2)). I even asked them to go straight to the dev team with the report, they said they will do that, since then I haven’t heard from them.
UPD. Looks like recent update resolves wifi issue, so far it was good in a last 2-3 days.