Why necro-bump a 6+ yo thread rather than post a new question? Especially that it’s not related to the original query. [HR][/HR]
That’s because you’re setting Rotation every frame (or even more often) to be precisely that. First time this executes, you set the rotation to 90 degrees; the second and every next time you still set to the same 90 degree.
In short, you’re not rotating anything *by *90 degrees, you’re rotating it *to *90 degrees. What you want is closer to this:
Get Actor Rotation -> Combine Rotators -> Set Actor Rotation
Or, alternatively, *Add Actor World Rotation *instead.