API call changed? PickupContainerItem/EquipCursorItem

[Maymun]

Ok, This only happens with 2h. If I have 1h weapon and a shield on, and calling the following to equip my fishing pole(2h) resulting an error message of "No equipment slot available for that item". Attention, fishing pole is in bag 1, and i have empty spots in ba1 and bag 0.
ClearCursor()
PickupContainerItem(1,1)
EquipCursorItem(16)

Move the fishing pole(2h) to bag 0, and call
ClearCursor()
PickupContainerItem(0,1)
EquipCursorItem(16)

No issues, fishing poll equipped, and both main hand and off hand in bag 0.

This appears to be a change come with latest patch. May be a bug?