The UWidgetComponent doesn’t capture the mouse when playing in editor on a client.
It works in packaged game on both server and clients, but in the editor it works only on server.
I made a short video to show this:
For me it's more annoying than it sounds because i can't test my 3D UI in my networking game without packaging.
I’m not sure i’m using the UMG library correctly, but i still post in the bug section because there is a different behavior in the packaged game and when PIE.
We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will offer further assistance.