Enabling interpolation causes sprites that have had interpolated frames before to jump

[DNin01]

When interpolation is turned on, sprites will, if they are close enough and have already been present while interpolation was enabled, snap from their position since the last frame that interpolation was enabled, instead of just continuing from where they currently are.

Interpolation.snapping.mp4

This isn't usually noticed because most of the time, when interpolation is toggled, you're in the Advanced Settings modal, but when you use the Runtime Options extension to toggle interpolation, this becomes noticeable since it happens as you are watching the project.

Probably some variables storing old values just need to be cleared every time interpolation is enabled.