I woke up my phone when i was listening to a podcast (had the podcast list visible as the last open screen)
The screen try to refresh but failed it seemed and showed the home screen behind the already visible text.
The home screen was the screen which i was able to use, even going to the same screen it still held just rendered it again...
I guess cleanup was not done correctly.
Trying to reproduce it was not possible (yet), maybe background status might have something to do with it.
Using Samsung S8+ running Oreo 8.0.0