BUG - Can't captured the pieces

I found a bug in 4 player chess while im doing a video recording. 

or did i miss something here? 

and this is not the only bugs i experiences since last night i end up to many mouse slip because im using the left mouse to show the arrow in the board then suddenly my pieces moves in that direction. 

its around 5:55

https://www.youtube.com/watch?v=X8Ub7SAbzhU&feature=youtu.be

Okay thanks it'll be fixed quickly

Tried the position but it worked. How long ago did this happen? (1 hour ago, 2 hours ago)?

i think 1hr ago. check the video around 5:55 and you can see what is the actual happened thanks