Redmi Note 9 Pro with LineageOS 18.1 (Android 11).
Stay away from Xiaomi's phones if you plan to use the stock MIUI Android they come with. My SO has a stock Redmi Note 11S and MIUI is the biggest piece of bloated instrusive shit that I have ever seen on a phone.
Yeah, we're not troll sciencing light out of nowhere, but if the lamp is next to a mirror instead of a wall, the room will have more illumination, because the mirror is reflecting the light emitted by the lamp better than a wall will do.
The issue you described can occur due to repeated cycles of editing and saving jpeg images and closing the editor in between.
If i'm editing an image with an editor and i keep saving periodically as jpeg, while the editor remains with the file open, it still has the original before-degradation image so even if i save 10 times as jpeg, the final result is being compressed only once.
However, if I save, close the editor the and then reopen the same file again for more editing, the software has to work with the "photocopy" I saved before, and is this cycle is what could degrade the image.
When you work with image editing, you save your work in a lossless format and only export it as jpeg the final copies that you won't be editing.
Same goes for mp3 files.
But remember, you can open those files anytime to watch/hear them without any degradation.
What are you? Some kind of socialist pig?
The CEO needs another 100k watch!