I've noticed that some modules (such as the cpu, memory and date) stop updating after the system clock has moved backwards.

I dual boot with Windows which is constantly messing up my hardware time, however NTP fixes it when the system boots. This usually happens after Polybar has been launched though, and it ends up in this broken state.

I'm running 3.0.5 on Arch. If I get time this weekend I'll look into fixing it, but if you know where to start looking that would help :)