I also finally got this solved with another way. I was uninstalled Intel Rapid Storage Technology (Serial-Ata Driver) drivers. Working now without randomly ejecting .
Just purchased a refurbished Dell Inspiron 5567 (Tag #FH6BJ22) from the outlet, which has this exact same problem. Purchase date NOV 2017.Seriously, why is this still even a thing? What's the currently approved solution?