I was following this course using UE5 version 5.4.2 and building a "Handle Rotation" graph for a door that looks like this:

I encountered this problem: setting the Interp Speed to anything but 0 makes the Return Value wrong.

I mean that, as I understand FInterp, it should eventually return the Target value, but in my case interp speed just makes the value wrong.

For example (Current = 0, Target = 90, Delta Time = World Delta Seconds, Interp Speed = 3) the return value of this is equal to 0.375.

I used event tick to set the delta time but it changes nothing.

Just setting the speed to 0 makes it work, but that is the problem, I want smooth rotation for my door.