Well, @wolfedawwg has a point about maybe bad insulation somewhere, or a poor connection.
You could take the fixture apart, check that all wires are looking ok, all connectors are tight, and post a picture of the guts for us. For me anyways lol I am super curious if yours is different from mine…
Then you could see if the diode PCB is grounded or not. And you’ll know what it looks like…