LZW31-SN non-neutral weird issues

Glad you figured it out. IMO, LED bulbs are still a bit of the wild west. Some are compatible, so are not.

Inovelli has a user-contributed compatibility list. They’re also working on an app. Take a look at the following and try to get bulbs that users have reported as compatible. If you get a fixture that accepts standard E26 based bulbs, you can try different bulbs to see what works. You’ll probably still need the bypass as well.