same me its June update ... but though shitsung will fix the issue it wont make any difference.. i already moved to p40 pro + .. my friend as soon as he saw my phone he sold his s20 ultra at $1200 which is Rs 47000 ( Mauritian Rupees ) and he took p4...

i got the same problem today its 28/06/2020 at 13:00 +4 . i locked my phone and after 2 mins i unlocked to see new whatsapp message and my screen flickered 2 times and came green i locked and unlocked it came ok i restart and there you go gree...