There's a bug in the Delta Air Lines chess program. After cxd6 en passant, the captured pawn isn't removed [0]. White's bishop is then able to check the black king through the pawn (the pawn that should have been removed) [1].

[0] https://drive.google.com/file/d/1Nyov4F7eWbT8uNoeclPY8uXVG6f...

[1] https://drive.google.com/file/d/1eEPBHqE5rpefE9gWflgS_hUwYGS...

I guess it's just a display bug, then? Though it's hard to imagine what kind of bug would lead the game state and the visual representation to get out of sync in that particular way.