New Telegram Notification Showing For Few Sec

[Machine1104]

hi
i have a redmi 4 pro with last weekly rom installed
i already set permission, auto-turn on and i receive the notification but the popup show just for 1 sec and then disappear
how can i fix?
thanks

 

[zak1990]

Same problem on 6.12.29 weekly ROM for Redmi 4 pro