Since upgrading our PRTG server to 18.104.22.1681, the iPhone app will no longer filter alarms. I normally set the filter to only display Down sensors on the Alarms screen. Now it is displaying both Down and Down Acknowledged sensors. If I change filter settings, it makes no difference, and returning to the filter settings page shows all filters turned off. I have tried killing the app, and also rebooted the iPhone (both gracefully and hard-reset), but this hasn't helped. I have confirmed this with 3 other iPhone users in my office.
I'm running version 2.1.10984 of the iPhone app, and there doesn't appear to be any update available for the app. Is this a known bug since the 8.2 PRTG release?