Image corruption when re-connected to world or copied by pressing F

[kyoul1]

When you create an image using mode and exit and exit the world, the image is slightly damaged unlike the original.
I experimented with changing the settings, but I don't know the reason for this.
This is also what happens in multiplayer. When the user logs on, the previous paintings are shown damaged to the user.

[deltanedas]

just wait for it to fully redraw

[kyoul1]

just wait for it to fully redraw
It won't be redrawn even if you wait for 2 hours