When updating a ticket (e.g., satisfying the conditions for an SLA) in the new issue view, the page doesn't update for over a minute to show that the issue has met that SLA.

The delay for the old issue view is typically a couple of seconds and when doing so in the new issue view, refreshing the page shows that the SLA has been met already. As such, it seems to just be a polling time setting (to see if anything has updated) for the new issue view.