AI can transport pop beyond its fuel range
1oom_save2.bin This is an early-game save. The Mrrshans are about to land troops on Rhilus, which shouldn't be possible; the transport is coming from the green star beside violet Klystron, 8 parsecs away. The next closest possible system they might have is the red star left of Drakka, 7 parsecs away. (The blue star 5 parsecs from Rhilus is Orion, so not a Mrrshan holding.) I can see how their fuel-tanked scout can reach Rhilus, but the transport shouldn't be allowed.
If you pass the turn, win the ground combat and ignore other events, then a couple turns later another transport can be seen coming in. This can be verified fixed if the other transport no longer gets sent.