Same issue, very frustrating
Same problem, it does seem to happen more in low light.
Connect to a Wi-Fi network that has the same DNS server IP configured for both Primary and Secondary.
Same issue on a OnePlus 8 Pro running 10.5.4 :(
Same problem on a 7 Pro, been like this for months, seems to reset after a restart. Nothing I've tried fixes it.
Same problem with OnePlus 7 Pro, OOS 10.0.4
Works initially, but reverts after restart
It causes an issue with the default clock when you switch back to OnePlus ambient mode, the clock loses its signature red number.
If your using an Android watch, then turn off Watch Notifications for the Phone app via the Wear OS app:
Wear OS > Notifications > Change watch...
Install Wear OS, pair a call capable Android Watch and enable the default notifications.
Update, I have found that disabling Picture in Picture for all apps from settings helps minimise the occurrences, if not completely illuminate them.
Same issue, I have to reboot phone when WhatsApp hangs, it seems to crash the whole OS.
Since update to 10.0.2 my 7pro keeps hanging, I'll be using the phone normally, typing a message or something similar when it will just stop...