Thanks for that,
I think that ‘Set Relative Location’ node is the source of your problem.
The ‘update’ function on the timeline is being called every frame, and in the process of querying the Time → Value maybe a float is getting rounded. (Framerate could come into play here too)
Here’s a picture I took yesterday for this thread (I think you both have similar problems and the same solution)
The idea here is to move between 2 locations based on a 0-1 value. (And you could still use the curve in the timeline to get ease in/out while animating)
Let us know if you have any troubles with implementation.