Not entirely cured but erotic(?) giggling is from Chrome's scroll bar. If the window is slightly smaller than what HG wants to paint, the vertical scroll bars flashes on and off rapidly. Not sure why it just does not stay static but something wants it on and something wants it off. I had my scrollbars razor thin but not gone.
Previously, I had been trying to ignore it, you know, if it does not exist it will go away. Then I just sat and watched the top banner and the bottom banner to see if something was being produced subliminally. My left eye crossed over the right one and saw the flashing scrollbar. It is a nice party trick but usually no one is impressed and it leaves me with a headache.
Have researched Chrome scrollbars and found prior to my present issue Chrome 79 plus some change, the scrollbars could be hidden. Not so on present version. Saw there was a Beta Chrome 80. Almost took the bait until I saw Warning, might be UNSTABLE. Sulked off to the TV figuring I was stuck with having long page and/or wide page scrollbars giggling my HG. Not exactly what I would like to see giggle.
But, hold the shoe phone Agent 86, I did arrive at once resolution...shorten Group page/window shorter than my PC screen. Tried first to subzoom to 90%. Could get more on the screen but it did not universally behave toward a stealthy scrollbar when going from Group to Group.
So I have shorten my Dashboard by removing some modules and created another Group where I put all the nice quick actions like Memory Cleaner, Drive Cleaner, RPi Reboot, Date/Time Reset, etc. I had already done this with my X-10 Modules and that is why their screens did not giggle.
Once again, allow Tuicemen's Buster PiHub to regain the position atop the pillar.