my firewall is disabled without my authorization

My firewall is deactivated, or at least that is what I see, repeatedly and almost two to three times a day the avast premium security firewall appears deactivated, sometimes it asks my attention to reactivate it and in others I simply change tab and when I return it is already active, I wanted to know if this has any explanation.

Repair Avast:

  1. Avast GUI → Settings → Troubleshooting
  2. Click on ‘REPAIR APP’.
  3. Follow instructions.
  4. Reboot.