It’s very odd ADC does not show that as an active issue. In the past we’ve seen some issues with GC3 “smart areas” (partitions) where some notifications on the panel do not clear properly.
If you click on smart areas do you have the trouble reporting in the proper partition? Are you able to acknowledge them there?
If you power down the panel completely, transformer first, then battery, wait 30 seconds, then plug in the battery followed by the transformer. Does the supervision issue come back within the first few hours after boot up?