I am getting the same problems phone slows right down and then get the message. Rebooting only seems to solve the issue for a few minutes.
You can try uninstalling updates from OxygenOS Launcher
That might help.
Or clearing cache from Recovery mode through advanced reboot.
Restart your phone
Clean the junk file it will be okay👍👍
You should clear the cache and unwanted files and then restart your phone..
If it's not working copy your data and factory reset your phone
I have this issue too and also my ig and other apps do the same
Sound like hard reset for fix
no need to hard reset... just clear cache and junk files. and restart your device. it will solve the problem... i face this issue on my oneplus 6t, and some time it will freeze also...
I just got this phone, downloaded a few apps, opened maybe 3 windows, and suddenly the webpage is unresponsive. I did not get a "system UI is not responding" message. But I wonder what the issue is...
Try restarting the phone clearing the cache memory....
Same problem with me. These errors have become frequent. My phone is oneplus8t.
Cleared cache for oneplus launcher
Resting app preferences
View attachment 1509208
View attachment 1509209
Clear the cash and restart your phone
Survey: Original Protective Case and Film for OnePlus 8 Series and Nord
by Tom B., 2021-01-13