There is a custom DTH that allows you to modify the ramp rate on the GE switches. I just did a quick and dirty test and by modifying the parameter 9 value from 1 up to 99, the light no longer dims when triggered on or off. But…it ended up messing with my ability to dim from the wall switch. I did not test much else including changing any of the other values to see if I can find a middle ground.
The DTH I am messing with is from jscgs350 called the “My Enhanced GE Dimmer” from this thread:
https://community.smartthings.com/t/3-way-dilemma-leviton-or-linear-for-kitchen-living-area-instant-or-not/54157/20