"Problems" stays open even when the agent\computer is offline

[galavichid]

Hi,

Some of our machines we monitoring are turned off when not used. from time to time, if some of these machine, reaching to high utilization, zabbix creates 'problem'.
Some of the problems will stay in the frontend even after the machine is off:

Even if i try to update and close manually, it will be created again. and the machine is off.

Any idea?