No notification on lock screen p20 lite

[holymann]

Hello,
I did not receive notification on lock screen on my ny p20 lite. Not from all application but from most of them (google, gmail etc). When i wake up the phone all the notification coming. I have read much here and on other sites and have tried all (app launch is change to manual, ignore optimisitation, magazine unlock theme etc). Nothing working. Is there some solution?

Thank you very much for your help!