Tethers strech under timewarp when grounded

The picture might look bad, but please look at it from a technical perspective.
Steps to reproduce:
1. Tether an astronaut to a part of a grounded craft above them.
2. Retract the tether so that the astronaut isn’t grounded.
3. Switch to a grounded craft(otherwise the game stops you from using timewarp)
4. Activate timewarp
The tether should lengthen and the astronaut will glitch into and through any craft-parts below them.
Edit: After going to x500 and back to x3 the astronaut was flung back to the craft and started floating like a balloon.