Gearbox please fix

I have found every named location in the game, all proving ground, all circles of slaughter, etc. But the find all named locations achievement still will not activate for me

There is one in Eden 6 that’s a pain. It’s in floodmore basin.

Might be missing it. It’s called Jason’s waterfall?

I found it already, I have every location unlocked when I look at the menu for it but still no achievement