I'm using CUF and squared at the same time.
CUF for group and solo.. Squared for Warband

What steps will reproduce the problem?
1. Form a warband
2. Hide all the default Warband frames

What is the expected output? What do you see instead?

CUF is hidding the group window when forming a warband but it needs the default first warband group to be showed to do it.
If you hide ALL the default warband group window ( to let squared to the job ), CUF still displaying the group window

What version of the product are you using?
Sqaured 1.9, lastest CUF

Please provide any additional information below.

It seems CUF checks if the first default warband window is showed to hide the CUF group window, thus when hiding all the default warband group window ( to use squared instead ) CUF is still displaying the CUF group window