https://imgur.com/a/xjRTuYG
(First vigilante was killed n1, the "vigilante" referred to in this post is always the same, second vigilante) I disguised the mafioso as the transporter, the same night mafioso was shot by a vigilante. The mafioso also killed the vigilante that very night. I did not receive any indications that anything failed in the disguising (witching, roleblock, etc), and the retributionist was executed so the transporter wasn't in jail.
When the night ended, all players appeared to be their roles. Mafioso showed up as mafioso and had been shot by vigilante. The only way this could possibly have happened if it weren't a bug is that transporter transported themselves with the mafioso, but I'm not really sure if that happened because they never posted their will. This seems highly unlikely though, so I figured I'd post a bug report so that it could receive some additional testing.