First of all, none of them had completed basic training and were on active duty.
They all have been unable to clear their background checks, the major stumbling block in the process.
The MAVNI program was started under Obama and a Pentagon spokeswoman told CBS News MAVNI was suspended in 2016 because it "was vulnerable to an unacceptable level of risk from insider threats such as espionage, terrorism, and other criminal activity."
Kaliuzhna's records indicate she was flagged because of discrepancies in her answers during her security review. Her screener believed her "ability to protect classified information has been compromised."
That’s why they’re being discharged.
Much more @ The real story behind the MAVNI discharges