Display doesn’t turn off when connected via bluetooth

[l3olt]

Hi

I have experienced that for a long time and is still not fixed.

when I’m connected via Bluetooth ( speakers or headphones) and Spotify on the background, sometimes I lock my phone and after that if got one notification or if I touch the display, the display doesn’t turn off anymore. I did already looked at the iPhone settings but I cannot solve that. I noticed already that just happens with Spotify. To fix I have to close the App completely.

Plan

Premium

Country

Germany

Device

iPhone X

Operating System

iOS 12.1.4

My Question or Issue