Ribbon particles will still scale relative to the parent velocity. What you might be seeing is the ribbon particles scaling very large after the teleportation giving the appearance of inherited velocity. I’ve tested this by teleporting a cube with the ribbon emitter attached and observed the behavior with inherit velocity on and off. There is a definite difference however, this seems to be scaling issue.
This scale stretching is occurring since the particle emitter is still reading the teleportation as movement so the further you teleport the more it will scale. You can disable the particle system during the moment of teleporting or
you can significantly reduce this stretching by enabling “Tangent Recalculation every frame” in the ribbon module.
Let me know if that helps,