Ignore that, it's harmless.
The problem is that the driver has no way to know if it's connected to the panel or not. In the past, I've seen situations where the panel simply stopped sending anything and the HE driver was unaware of that. The alarm panel would not start sending messages again until the connection was reestablished by the driver.
To fix that, I record the last date/time a message was received and if nothing was received by the timeout threshold, the driver closes and reopens the connection to the panel. That is the log entry you're seeing. I think that if you only have a few sensors in your alarm system the panel will not report as often as a system with a lot of sensors. I'll probably make that time period configurable, but I haven't had time to work on this for a while.