is it when you raise the MIDI editor ie. double-click the current selected clip on main track's view, or hit, possibly via a keyboard shortcut as I think you have many, to main menu Clip > Edit... ?
if yes then that's probably the cause for it to show somewhere else than the last time: it takes into account the place you hit with the pointer or where the clip appears on main view.
hi, failed to reproduce the issue...
when does it snap back exactly?
is it when you raise the MIDI editor ie. double-click the current selected clip on main track's view, or hit, possibly via a keyboard shortcut as I think you have many, to main menu Clip > Edit... ?
if yes then that's probably the cause for it to show somewhere else than the last time: it takes into account the place you hit with the pointer or where the clip appears on main view.
seeya