I am in the exact same boat as you, 100%. Clearly there is a firmware issue with these lights. I’ve even been engaged with Juno, and it’s clear that they know of the issues.
The problem is June seems wed to Smartthings and Samsung who I believe did their firmware for them. So I even abandoned Z2M and bought a Smartthings hub. Recent firmware updates there have made even that platform unstable and unable to add more than 25-30 of these lights. It is literally like playing wack-a-mole, you’ve got that right!
Kitchen with 10 downlights took 4-6 hours of trial and error to get all ten paired and addressable on the Aeotec Smartthings hub. I haven’t even gotten to the step of trying to port over to Home Assistant and use adaptive lighting.
Smartthings migration to edge drivers has disabled the ability to do firmware updates OTA, so maybe it could be done via Bluetooth like Hue uses, but even then I’m not sure.
So so frustrated and I’m in for 56 of these in our remodel, so moving over to Hue would be an expensive proposition, but I feel like a year now is long enough, so I’ll probably cut my losses and slowly migrate room by room.
-Jonathan