I can't determine the exact trigger of this bug yet, but often when I have a star that has multiple satellites, and those satellites specifically list that star as it's "parent," if I attempt to change the temperature in Kelvin using the arrow up and arrow down clicks, it instantly begins to display the projected paths of each satellite listing that star as parent. I can type in a new temperature just fine, but I just have to avoid the arrows.
You follow that? Anyway I can reproduce this about 80% of the time just by making a star with 20+ orbiting objects and changing the temp with those arrows.
It's a serious problem when you have, oh, say 100+ objects listing that star as a parent. 000 fps straight away!
Also, once it's done, it's permanent on that object: anytime i select that star after that, it displays all those projected paths.
Steam version 2.1.2.