To update, it seems robocode version 184.108.40.206 through 220.127.116.11 had entirely broken getTeammates/isTeammate, which breaks various TeamRumble/LiteRumble bots, including but surely not limited to LunarTwins.
This bug appears to have been introduced to 18.104.22.168 as a side effect of the fix to this bug.
Version 22.214.171.124 fixes a bug with getTeammates/isTeammate.
So Skilgannon if you're reading this, we should probably update the literumble version to 126.96.36.199, and also clear all TeamRumble/TwinDuel pairing data that was from a client with one of the flawed versions. Given things appear to have went from 188.8.131.52 to 184.108.40.206 in LiteRumble, it looks like it's just the 220.127.116.11 results that need to be cleared from TeamRumble/TwinDuel pairing data. :)
Rumble is updated to only accept 18.104.22.168. I will wipe the Team / TwinDuel, unfortunately they aren't stored by upload version.