Yes it is. HIPS that doesn't know what actions to ignore and what to warn about is a problem. And I'm not talking about ignoring actions as such, I'm talking about things that don't actually change, but since old HIPS doesn't understand that, it's alerting you about it every 5 seconds. Try latest Comodo FW and if it behaves the same, then there might be an issue. If there wont' be any issues, the reason was present in an outdated Comodo software.