Ok I thought that fixed it for me but I tested my mod again and it didn't work.. That was to fix another bug with resizing to larger sizes
Ok to fix the bug change the OnHide of the Bag Window Page to:
'slot 0.visible'=false
'slot 1.visible'=false
'slot 2.visible'=false
'slot 3.visible'=false
'slot 4.visible'=false
'slot 5.visible'=false
'slot 6.visible'=false
'slot 7.visible'=false
'slot 8.visible'=false
'slot 9.visible'=false
'slot 10.visible'=false
'slot 11.visible'=false
'slot 12.visible'=false
'slot 13.visible'=false
'slot 14.visible'=false
'slot 15.visible'=false
'slot 16.visible'=false
'slot 17.visible'=false
'slot 18.visible'=false
'slot 19.visible'=false
'slot 20.visible'=false
'slot 21.visible'=false
'slot 22.visible'=false
'slot 23.visible'=false
'slot 24.visible'=false
'slot 25.visible'=false
'slot 26.visible'=false
'slot 27.visible'=false
'slot 28.visible'=false
'slot 29.visible'=false
'slot 30.visible'=false
'slot 31.visible'=false
'slot 32.visible'=false
'slot 33.visible'=false
'slot 34.visible'=false
'slot 35.visible'=false
addeum: Tested briefly seemed to fix it..