UBB.threads PHP Forum Software Community Forums UBB.threads 7 Bug Reports 7.6.2 Gallery file manger window resize

I have this issue on my one site but not the other. The site running the latest version of UBB has this issue per my UBB license, have not upgraded my license for the other as it is not a busy site so I didn't bother upgrading that license.

One site is running 7.6.0 and the other with the problem is running 7.6.1