Drawer won't reset to top

[snc001]

Hi guys,

If I leave the drawer scrolled to the bottom then close it - once I'd tried reopening it it will try to "be smart" and reset to the top but! it creates a massive gap at the bottom instead.

Meaning it'll only show the bottom of the drawer with massive background colour of the drawer.

What should I be looking at to fix this; tried debugging but I must be looking in the wrong place.

Any suggestions?

Regards