about 3 years ago - Dynamoon - Direct link
Hi! Sorry for the delay, but here's what I got from my colleagues:

"This is most likely caused by the lighting: when a light source is moving relative to a sub, it needs to constantly recalculate the shadows cast by the things the light hits. Because of that, subs/shuttles with lots of external light sources can cause a large performance hit"

Do you think that would explain what you're experiencing?