It’s because it was moved from Game Discussion, something we shouldn’t do anymore but oh well, it’s not a big deal.
I manually edited the timer. I guess the cause was that system checks all suggestions 24h after the last reply, as it should, but only closes if the timer says so and that counts as a “reply” so it bumps it.
Seems like a weird way for it to work, but it should never happen so I’d call that undefined behaviour and go on with my day.