When using /clone on a whole bed to a new location, it is normally visually gray until the chunk is reloaded.

World attached. Read the two Helps (two of the Impulse Command Blocks) by button (the final Impulse is for resetting the area that gets cloned to, but does not reset the original beds) then turn on the Repeating Command Block. Break each one starting from first AWAY from the originals and do so for each until all of them are the correct color (a successful clone).

If you do a single color that is not red or a gray, black or white, (blue works) go down the full column and then jump back to the first away from the original and punch it to see many get reset to the bugged color state.

Device: Samsung Galaxy Note 4
Custom ROM / rooted