I also noticed as @natescook1, that if you dim the light even slightly, the flickering never happens. For whatever the reason it is happening, I am not about to rip out 70% of my dimmers and replace them right now. So to work around the issue, I’ve been using @baldeagle072 's excellent “Dimmer on Bright” app to set my problematic GE dimmers to 80-90% brightness on startup. Hope this helps someone else…
What I would like to do next is add a little conditional logic to the app so that it only makes the the dimming change if the light is currently set for >96 brightness. I’m sure it is just a simple conditional if else statement after querying the brightness, but I just started learning groovy and don’t know the ST event handlers well yet. While the Dimmer on Bright app is great, a use case for the conditional logic above is if the dimmer was previously set to say 30 for reading, shut off shortly, then upon returning to the same light, you get blasted by 90.