[4.7]UMG widget spawning bug

It is easily to reproduce.

I recommend you to enable Show Frame Rate and Memory option.

First, Create a widget blueprint.

  1. Open UMG editor.
  2. Select a widget you want to place.
  3. Click and move a widget into a preview window with keeping mouse button down.
  4. Widget will be created again and again until you release the button.

It also increases memory usage and object count.

Howdy Varioov,

Thank you for reporting this issue. I have tried to attempt a quick repro of this issue internally and have been unsuccessful so far. Would you be using a source build of UE4 or a binary version? Would you also be able to attach your DXdiag to this post? Would this issue occur with a specific widget or with all widgets?

Any additional information would be greatly appreciated.

Thanks and have a great day!

I did it with a binary version of 4.7.

I forgot a condition to reproduce it.
You should click and move(surely with keeping button down) a widget into a widget that can have a child.

for example, moving into CanvasPanel, Borader. etc.

The important thing is to keep a mouse button down so the widget you want to place into another widget is not placed. Do like drag and drop but not dropping actually.

I also tested it on two different system. It showed a same result.

Hey Varioov,

Thanks for the video that you have linked. It has helped me to recreate this issue internally. I has placed Jira Report 10820 into our bug database so that the issue may be addressed in a future release. Please let me know if you have any additional questions regarding this issue.