I use Medibang on a Samsung and a few times I've been having trouble with it backing up when I try to insert an image to the canvas. It starts backing up and then the pop up goes away suddenly and then I can't access my files for some reason even though I know they are there. Sometimes the screen turns black. Sometimes it works normally on different canvases. Sometimes it pulls up the files menu but doesn't show my files. Idk what this is but I've had this issue before and fixed it by deleting a bunch of files... :(( if no one else knows I might send in a report DX