Ui is not working appears suddenly during use

Hey there, I used to have the same problem when I had too many power hungry apps on my phone. Use the optimise tool to do quick fix. Also only use the cleaning tools in security feature on the device only no others...they are full of malware.

Use an Ad Blocker like my favourite Adguard, this will keep your phone free of malware and ads. These eat up your memory as the trackers are trying to track you.

Turn off your ads by using above mentioned Blocker, and delete your Google ad id...it will issue a new one immediately but with Adguard no new ads come through except where allowed.

Use lite version of Instagram...😉, works just as well but uses less memory.