In case this is of any use in debugging this issue, I find that this issue only occurs if a CPU / Core utilization level is at 0%.
I have my sensor panel configured to show a bar for each of my 32 cores. When the system is idling, some 0% cores will show but the majority are disappearing and re-appearing with each tick of the system.
Conversely when my system is under load and all cores are above 0%, then all of the 32 sensor item bars show and never blink out.