AI Hints lead to impossible/wrong colors

[sarahmamy]

Don't know the steps to reproduce but the hints seem broken. It appears like no color is possible (critical rainbow - https://www.hanab.cards/LateLionPlum-0)
Tested playing with an AI

Card E has no color possible
Card B C and D are supposedly rainbow but aren't

[dcorbin]

It's possible that this is because the AI for Rainbow gives illegal hints (identifying cards as rainbow, seen on turn 24). I think there is an old code branch that may fix this, but I don't know any details about the branch or the AI.