EmEditor Professional (64-bit)
Version 20.0.901
W10, 1803
By minimize the window, also minimized the other window (when I made a new group before). By double click on taskbar to activate it again, both windows came back. If I have more groups, the last 2 are “glue/stick”.
for example
W1 = window one
W1-2 = new window (group) made from W1
W1-2-3 = new window (group) made from W1-2
on this case window W1-2 and W1-2-3 “glue/stick”.