I noticed this type of problem when I was making my bag mod too. I ended up putting in a dummy window frame that has the script:
<Page Name="WC_Frame" OnHide="Parent.Icons.Size=144,324 ; Parent.Size=144,324" OnShow="Parent.Icons.Size=144,324; Parent.Size=144,324" ScrollExtent="0,0" Size="0,0" />
It looks like clicking the default location button will do the same type of reset.
Othesus - Dirge - Lucan DLere
Vaspar - Fury - Lucan DLere