Mange Favourites - move the bottom item up - Potential bug (can someone test before I go into full diagnostic mode)

[jasonjac2]

Problem to Solve

I have a lot of favourites (maybe 30) and for a few versions of OM now, I get an exception when go into manage and start moving the recently added one up the list (using the up button), first click is fine, second or third time I get an unhandled exception.

If anyone can confirm it is an issue or is fine will dictate whether I package up the exception and raise here OR remove all fav's and start again and see if I can reproduce........
Latest version (6.7.1) and has been the same going back about 6 months
TIA JAC.