Android / nobile
Yep. Not a bug. It has to “break the game” to be classified as a bug. Anything else is simply an inconvenience for both we the players and the devs.
So, unless it logs you out, locks up the game, or something else where you cant get in and potentially buy something, it wont be considered a bug. Since not being able to see the image doesn’t prevent your spending money, it’s of minimal concern.