Sorry to necro this, but it is still happening, at least for me, with battery optimization to unrestricted. Also, since the update of Nothing OS 2.5.3.A I have problems with Whatsapp notifications on lockscreen. I cannot see them until i unlock the phone. Once is unlocked is when I see the whatsapp icon on the taskbar. Also, sometimes the notifications dissapear while expading them.
I’m starting to get frustrated, because since I bought the phone i been facing issues with the hope of been solved with future updates… But looks it not the case for me.
