recently I found that if I edit a misison file too much (whether too many stationary ojects or save the file too many times...), I will get my TGP TD box deviate from where it actually pointing at.
see the picture. I don't know if this is a confirmed issue or it's just me. One thing I can be sure that if I give up the file and start a new one, the issue will be gone. And when I edit the new file enough, the issue comes out again...