Go into minecraft (creative, survival also affected but just for ease)
grab an item (single item) and swing your cursor left and right while trying to drop an item off into a slot in your inventory
in 16w44a the item does not get dropped from the mouse.
in 16w43a it did drop into the correct slot from the mouse.
For clarification:
https://www.youtube.com/watch?v=Y1-4h02eFv4
This shows the new and old behaviour
Linked issues
is duplicated by 8
MC-109565
Single item cannot be placed in a container slot while cursor is moving
Resolved
MC-109582
Can't place item in inventory slots while moving the cursor
Resolved
MC-109589
Bug slots
Resolved
MC-109606
Delay in creative Inventory
Resolved
MC-109622
We have to give 2 clicks to place one item in rotbar
Resolved
relates to 1
Comments 5
May have duplicated their post, but I tried to explain the bug as best as I could and also post a video for more clarification since the bug may be to vague to explain. that is why I posted so late, due to all the other effort put into this.
(At the moment of creation, that other bug report did not yet exist, so search result yielded 0 results, this is not like YouTube comment section where the first commenter wins...)
Can confirm
This is probably the same issue as MC-109565 but this one explains the issue better