Input disabled for all UMG when SetIsEnabled is called from code

Calling SetIsEnabled on a UMG button in code will prevent any UMG input from being read (can't click other buttons/checkboxes, can't enter text into field, etc).

Regression:
No - code used does not compile in 4.14.3

1. Open UE4 Editor (any project)
2. Add code based on UserWidget (MyUserWidget)
3. Add the following code to MyUserWidget.h
   • Add above .generated.h include:

     #include "Runtime/UMG/Public/Components/Button.h"
     

   • Add below GENERATED_BODY() line:

     public:
     	virtual void NativeConstruct();
     	UFUNCTION() void OnButtonClick();
     	UPROPERTY() UButton* Button;
     

4. Add the following code to MyUserWidget.cpp

   void UMyUserWidget::NativeConstruct()
   {
   	Super::NativeConstruct();
   
   	Button = Cast<UButton>(GetWidgetFromName(TEXT("BP_Button")));
   	Button->OnPressed.AddDynamic(this, &UMyUserWidget::OnButtonClick);
   }
   
   void UMyUserWidget::OnButtonClick()
   {
   	Button->SetIsEnabled(false);
   }
   

5. Compile
6. Create blueprint based on MyUserWidget (MyWidgetBP)
7. Add Canvas Panel to MyWidgetBP
8. Add two buttons under Canvas Panel and rename one to BP_Button
9. In level blueprint, add MyWidgetBP to the viewport
10. PIE
11. Click BP_Button

Result:
After clicking BP_Button, the other button does not react to being clicked

Expected:
BP_Button is disabled but other UMG elements are still active.