I've seen the same issue with a pair of Adata SX8200 Pro drives (2TB), a Samsung 960 EVO (1TB), a Samsung 970 EVO Plus (2TB), and a Crucial P1 (1TB). I've documented adapter issues here:
[link|https://www.schwie.com/brad/?p=1235|https://www.schwie.com/brad/?p=1235|new_window=true]
Even after identifying disconnected board leads and soldering the leads back to the board, I think I agree w/ @danj that both the adapter and the SSD need to be replaced. I plan to keep updating my post linked above as I make progress. I'm also curious to hear what others here are experiencing, how did you fix the issue or did you just give up?