4.13 BUG: Widget Interaction Component stops working for all clients in multiplayer.
Tested in 4.13.1
I've attached a barebones sample project that demonstrates this bug.
Here is a video with annotations to demonstrate the issue: https://youtu.be/3udim6wRjgE
As soon as your game connects to or is connected to, the blueprint events bound to UMG buttons no longer fire. Meaning they do not even fire locally on any client (i.e. this shouldn't be a case of forgetting to replicate something).
The button's "Pressed" style visual is applied but nodes wired to the "OnClicked" event do not execute on the client.
As well as the above, you need to make sure your input triggers are not Consuming Input. Otherwise, whichever controller spawns first will take all input, and the other won't get any. Select your input events in the event graph and check the details panel.
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