(Running on Ubuntu 19.10)
After my unsuccessful attempts at getting Kerbal Space Program to load past the initial loading screen in LibTAS (Thanks to freezing at a particular point within the loading itself), I realized that I needed to update LibTAS itself. I can confirm that the game now loads properly with v1.4.0 of LibTAS (As opposed to v1.3.5, which I first tried it with).
I've currently found two new issues beyond the beginning load: Input file desyncs from inevitable load time differences (Even with LibTAS locking the framerate) and the overwhelmingly slow speed that the game runs at while hooked to LibTAS (About six FPS on the main menu, and less than one when I tried to load to a Career game mode).
While disabling Software Mode greatly improves speed, it ruins savestate functionality in the process.
With everything said, I made a very brief "Proof of Concept" TAS that plays around with some menuing at the main menu.
https://twitter.com/DStejGaming/status/1303098249172189185
The speed issues might be related to my own setup, but I never checked anything beyond LibTAS' settings.
