Why does a wallpaper on Galaxy Tab 8 shrink?

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Android Central Question

If I use a photo from Gallery as Wallpaper it will fill screen a few days but thenshrink to about 1/3 size spontaneously when in landscape mode. This has gone on for months and I have restored photo to full size hundreds of time.
 
Welcome to Android Central! Can you tell us the exact model name of the tablet? There was no "Tab 8" -- I'm guessing this is the 8" version of one of the various Galaxy Tabs out there.

How do you restore the wallpaper to full size?
 
Sorry it is the 8 in version of Tab 8. I just reset the wallpaper with the same photo and it stays that way for a couple of days and then shrinks against in landscape mode, never in portrait.
 
Tried this but did not get to safe mode but rather Android recovery with a list of options from rebooting to bootloader, run graphics tests , run locals text. No idea what all of these represent. Looks like I will just live with this problem. My wife's 10 inch version does not seem to have this flaw, yet.
 
Tried this but did not get to safe mode but rather Android recovery with a list of options from rebooting to bootloader, run graphics tests , run locals text. No idea what all of these represent. Looks like I will just live with this problem. My wife's 10 inch version does not seem to have this flaw, yet.
I believe once you see the logo just hold volume up until screen lock appears , looks like you still were holding both buttons and went to recovery mode.
 
Sorry it is the 8 in version of Tab 8. I just reset the wallpaper with the same photo and it stays that way for a couple of days and then shrinks against in landscape mode, never in portrait.

That's still not what I'm looking for. Go to Settings>About Tablet​, then look at Model Name/Number. What does it say there?
 
Trie d that way to get to Safe Mode but didn't work. However, I discovered that if I pressed poer but to turn off and then. hit PowerOff 2x I entered safe mode! Go figur. Reset wallpaper to see if it stays full size.e
 
Not sure if this was ever resolved or not. I'm having the same issue on a Galaxy Tab Active2 (SM-T397U, Android v9, One UI v1.1), and I tried the Safe Mode test. The issue does not appear to present itself in Safe Mode - if the wallpaper is already "shrunk" before restarting in Safe Mode it still appears that way, however if I set the wallpaper again to full size I can't get it to "shrink" with any of the normal actions. For me usually the issue happens with things like entering & exiting apps, entering & exiting Settings, or entering & exiting app folders - one of those actions will randomly trigger the wallpaper going from full screen to ~1/3 of the screen. Note that my tablet is always locked in landscape orientation, due to a HW cradle used with the device.
 

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