4 Camera streams and Log Queue goes to 100%

While working on some screen navigation improvements I noticed on the MD4 with 4 cameras streaming on the same screen the Log Queue (SIC) creeps to 100% in 5% increments. We don't have anything that would be attempting to add to the logs. Cycle Util = 18%. With 2 camera streams it goes to 5% but then appears to catch up and goes back to 0%, then repeats.

It doesn't appear to affect anything so this is really curiosity.  (IQAN 6)