Describe the bug
I assume this is related to the other open bug about the TV, but the Photo Frame will not retain a URL and display a photo. When you hit esc or the X to close the gui the frame remains blank and the URL is gone once you open the gui again.

Crash report
n/a

To Reproduce

1. Create and hang photo frame
2. Right click on frame to open gui
3. Input url. Stretch border on or off makes no difference
4. Hit esc or X
5. Photo frame remains blank and URL is deleted

• Minecraft Version:
  1.12.2

• Mod Version:
  6.0.2

Same behavior on 6.2.0-1.12.2
but only for regular players, for OP-s it works ok

Closing since I won't be maintaining 1.12.2 anymore.