Last game, the mods sometimes cut a night short. This time, the mods have expressed an intention not to do that.
I believe it's traditional in IRL mafia games, although I have never played an online one so I don't know how it transfers, that the private communication channel available to the mafia is only active during the night.
Even if not, it seems like killers with a private communication channel might get more benefit out of a guaranteed night length than killers without.
So the guaranteed night length in this game might represent evidence that we are more likely to have an actual mafia or mafia-like thing rather than last game's cult/SK combo.
Also, let's have the countdown box again: