Building queue doesn't work!

Hey i find bug when try to build Farm and i apeared in queve fo appx 3 seconds then it dissapeared but building license has gone!

I've come across another persistent problem with the building queue - the queue is counted as full with 2 buildings rather than 3 (3rd slot not working). This seems to fix itself by logging out and logging back in again but it's still a bit annoying.