Why do I need to double click to trigger left mouse button pressed event?

Development Programming & Scripting
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1

My code looks like this:

        UPlayerInput::AddEngineDefinedActionMapping(FInputActionKeyMapping("Perform action", EKeys::LeftMouseButton));

...

    input_component->BindAction("Perform action", IE_Pressed, this, &AMyPlayer::_PerformAction);

If I am holding down the right mouse button, a single left click causes the current action selected by the player to be performed. That is, _PerformAction() is called. However if I am not holding down the right mouse button, I need to double-click to get the same effect.