Steps to reproduce:

1. Create a maintenance window for a host
2. Wait until maintenance window is active, observe triggers firing and recovering for that host
3. After the MW has ended, go to Monitoring -> Problems for that host
4. Show: History (set the time selector to include the MW that has passed)
   Show suppressed problems: uncheck

Result:
**

Observe that triggers that fired and recovered during the MW are displayed, even though suppressed problems should be hidden.

Expected:

Alerts that fire and resolve within a maintenance window, should be hidded when "Show suppressed problems" is unchecked.

In my mental model, "is_suppressed" is a property that is attached to a problem:

1. If a problem starts...
   • outside of an MW: the problem is not suppressed
   • inside of an MW, the problem is suppressed
2. If a problem is acknowledged, the problem becomes suppressed (if it is unacked, its suppression status may change according to the logic of 1.)
3. If an MW during which triggers fired, ends...
   • ... triggers that recovered before the MW ended keep their suppression status (i.e. suppressed, because the alarms are fully covered by the MW)
   • ... triggers that fired during the MW now become not suppressed (unless they are acked)

In short, I assume "is an alarm suppressed?" to be true if there is an MW that fully covers the timespan between firing and recovering of that alarm.