When I upgraded to 1.6.3, all the existing nodes in IoX (including scenes definitions and programs) ceased working and each of the former nodes had a duplicate created with different node numbers (without duplicating the scenes or replacing in programs). Has anyone else experienced this?

Same here...just upgraed my EISY to 6.0.0

I have over 40 hue bulns and yhen rooms and groups so a mess!

Same here. Hue lights quit responding when I upgraded Eisy to 6.0.0. Noticed the duplicate nodes AFTER I upgraded the plugin to 1.6.3 but they were buried under the Hue bridge node (had to expand it to see them) and they may have been there from the Eisy upgrade.

Same here. Did not upgrade Hue plug-in so definitely v6 related. Good thing is everything should work fine after few hours of recreating linking. 🤦‍♂️

I ran into the same thing with 32+ devices and if you backup PG you can reverse the changes. There is information in the store warning that this will happen.

I figured this is for the best because this plugin is utilizing the new Hue API. The developer is also working on a new plug-in v2.0 that will support the new Hue bridge.