For polls on these forums, you can define a voting start and stop time. We just found out that when you create a poll on these forums and disable the start time, it will enforce a start time anyway of 12 PM the next day. This means that once you have posted a poll, it will take up to 24 hours until people can actually start voting.
This is clearly a bug.
The only workaround is to enable a start time and set it to the current time.