Android Nougat non-stock Apps Notifications don't show up when screen is off until i turn screen on

[Android Central Question]

everything is ok with sms , call and calendar apps but other apps like "Interval Timer" , "Tide" or any app that show notifications in specific times can't show notification when screen is off , just when i turn on screen they 're immediately show up and vibrate with notification sound...
it seems to be caused by Doze mode and battery optimization but i add these apps to "not optimized" and even no notification in screen off...

Android: Nougat 7.1.2
Sony Xperia SP
Resurrection Remix Nougat v5.8.5

Thanks