Unit Disappear from the Monitoring List

I add all available units to the Monitoring panel but with each new session (login) the list is 2-3 units short again.

Apparently, the user has no right to change their settings. If the option 'Can change settings' is disabled in user properties, activate it for a while, then log in as this user and add all necessary units to the Monitoring list. After that, you can disable the option again.

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