Looking at the available info on our end, it looks like your panel is not reporting any user data at all, not even syncing the code for the master user (which can’t be deleted and is always there). There is definitely a strange issue occurring which may be relevant to the issue you saw. I’m sending a command to the panel to try to sync up the ADC back end with what is saved at the panel.
Do you currently need to enter a code in order to arm the system locally at the panel?
When strange issues that seem unexplainable occur, it is usually a good first step to try and reboot the panel. Rebooting will restart all of its software processes and can often resolve problems.
You can find the reboot option on the panel under Settings > (Enter Installer Code) > Panel Reboot.