[Plains of Eidolon Maps [COMPLETE] (All Landmarks, Resources, Fishing, Mining)]

Where might the 13th cave be? I've found all 12 marked on the map but it still says I need to find another

[Mastery rank bug]

So I was getting ready to do my mastery test from 7 to 8. I switch to my ember and click to do the mastery test. It takes me to the flying ship loading screen then straight back to my ship, I'm in like a first person mode and I've been switched to my atlas. It said it "already tried" my mastery test when it never let me. Plus it took my mastery xp down to 50%

[Mastery rank mess up]

So I was getting ready to do my mastery test from 7 to 8. I switch to my ember and click to do the mastery test. It takes me to the flying ship loading screen then straight back to my ship, I'm in like a first person mode and I've been switched to my atlas. It said it "already tried" my mastery test when it never let me. Plus it took my mastery xp down to 50%