I'm not sure this is necessarily a bug as much as a hardware issue, but for me whenever I load in a craft, no matter how small, my screen will freeze up every few seconds and be unresponsive until roughly a minute has passed at which point everything runs smoothly. This could very easily be a hardware issue on my end so just checking if anybody else has been experiencing this before I submit a bug report on it.
Some specs:
16GB RAM
i7 processor @ 2.8GHz
Nvidia GTX 1050 graphics card
@AndrewGarrison This did end up being the issue, forgot I had two spent boosters sitting around on the runway. Running a clean save now without issues.