100D High Memory Usage

I have been having an issue with high memory usage on my 100D's since upgrading to 5.4.

I have done a factory reset and clean imaging of the 100D's.

I did have local logging turned on, but shut that off last night. memory was still building from 40% last night to 53% this morning.

I did switch the master and slave last night.

I disconnected HA this morning, wondering if the slave 100D is having the issue and flooding the memory on the master. Since doing this memory dropped back to 48% and is holding for the moment, but time will tell.

Hoping someone on here can  shed a little light on the subject. What exactly uses memory and why it does not seem to be cleaning it up as needed.

Thanks

Brian