I have an GE A19 giving me trouble as well.
The sequence I use to reset the bulb is:
4 cycles of 3 sec on / 3 sec off
On the 4th cycle my bulb will dim partially then go on bright.
Currently I have only one bulb. It had been working with my VeraPlus for a month or two then decided not to accept commands.
Earlier today I was able to reset it but only partially pair it. It was detected, the bulb blinked a few times but in Vera it looked like an indicator (no on/off/dim control)
I used both the current 2138 firmware and the previous firmware, add device was from the Vera list for GE A19 light/dimmer.
I’m not sure they are worth the trouble.
JohnRob