bug: crane can capture itself

in two different games I have observed that a crane can't go orthogonally backwards, but can instead move to the square it is already on, thereby capturing itself.

Did you make the crane-captures-self move in either game? If so, which game id?

No, I could enter the move, but I didn't actually submit it.

I observed this in two games, one of them is game 1286143, where I thought about playing 25.Cr1c-1d, but this was not possible. Instead Cr1c-1c captured the crane and added it to my pieces in hand.

There was a bug. It is OK now.

thanks :)