Retreat bug

Has anyone experienced a bug lately that wouldn't let you retreat when you should have been able to? I've had it happen twice now, this time it was a tatsu with an air balloon that got me the energy I needed to win with zard but I couldn't retreat it to make the final swing. It happened to me a couple days ago as well but I dont remember the conditions that time. I'm just trying to make sure I'm not missing something obvious here and it is infact a bug lol. I had retreated to move Tatsu up that turn so I'm confident I wasn't retreat locked.