Bug 1255936 IDropHandler does not trigger if dragged object has IPointerDownHandler

It might not be a bug, it it is unexpected behavior. And should maybe be in the docs for
IDropHandler

 

Found a video made in Unity 2019.2.6f1 where this issue is not present

 

I can't find any issue related to IDropHandler and IPointerDownHandler in the Public Issue Tracker (1, 2).

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Case 1255936

 

well I had the same $%#$%$ issue, I was searching for a long time, I updated my unity from 2019 to 2020 and I found then today after 4 days that they made this bug....

Solution: I removed the IPointerDownHandler and that is all, my game is working again after that...

https://unity3d.com/unity/beta/2020.1.0b15
uGUI: IDropHandler is not triggered when the dragged object has IPointerDownHandler implemented (1255936)