Request to undo 208 steps

[Dwedit]

Didn't get a screenshot in time, but this happened:
My opponent sent an undo request
I accepted it
My opponent cancelled the undo request
A prompt appeared saying "Request to undo 208 steps", then it disappeared after a second.

[Cave-O-Sapien]

Didn't get a screenshot in time, but this happened:
My opponent sent an undo request
I accepted it
My opponent cancelled the undo request
A prompt appeared saying "Request to undo 208 steps", then it disappeared after a second.

I've seen this as well (with a different large number).