This behavior has been seen in IQ Panel 2 systems experiencing hardware failure unfortunately. Prior cases have required replacement of the panel.
I would recommend trying a hard reboot by holding the side power button for 30 seconds. If no result, try an extended power down. Unplug the panel and disconnect the battery inside of it. Wait 2 hours then plug it back in. Any change in behavior?
If there is no change in the behavior, the 319.5Mhz IQ4 Hub would be a replacement option, or the IQ Panel 4.