Hi @HansF
Manual selection by drawing a circle around the object or by tapping the the object works fine on my S24U. I can also add stickers, resize them and move them around the picture to the desired location.
I would try clearing the cache for the Gallery and the cache partition. Please note that clearing the cache for the app is not the same as clearing the cache partition. I would try both.
In this pages it explains how to do it.
https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/
It is very easy to miss booting into recovery mode, when clearing the cache partition. If this happens turn off the phone and try again. If you are using a case, I would remove the case. Cases can cause unintended button presses.
By pressing the volume up and side/power key simultaneously until the Samsung logo appears and then release them, the phone should boot into recovery mode, Volume keys are used to navigate up and down, side/power key is used to select.
I would also recommend trying to upload a picture where the problem present itself, e.i. object selection, un-erasable small objects. We could try to replicate the issue, to see if it is picture or phone related.
Removing objects would leave some blurry behind depending on the complexity of the picture and the proportion of the object with the rest of of the picture.
