4.7.6
Tested 3 times
When starting a new project, and immediately change the characters speed using left shift, I have no problem.
But when I:
Create a new: Playerstate(add a few little things like health and mana), gamemode, controller, and a button UI.
Create and Add the UI in Controller(Constructor or graph).(So that the UI appears as soon as the game starts)
When the button is press, change the health or mana of the character.
Save & compile
Try to change the speed in Character and Controller, or anywhere else.
Play Game:
This should cause the movement speed to not change.