Colour index changes when rotating

[NealeTools]

Hi Remy - This seems a bit weird and intermittent. But using "r" seems to sometimes corrupt the colour indexing of a sprite.

See vid: https://www.dropbox.com/s/j2u6k94jusiuknc/Screen%20Recording%202021-03-29%20at%2009.50.48.mov?dl=0

In this case I keep selecting i15 to fill, and it reverts to i238 when I rotate the sprite.

I've also occasionally observed much bigger changes, that I have to press undo to revert. I wonder: Is the there some cached data that isn't being updated prior to the rotate, thus the sprite gets overwritten with rotated "old" data?