NBA YoungBoy has been under house arrest in Utah as he awaits his Federal trial in Louisiana for gun possession.

Yesterday, the federal prosecutors asked a judge in Louisiana to set a hearing to deal with YB's "noncompliant behavior."

According to the Feds, NBA was caught using drugs in violation of his probation and has told his PO he won't stop using.

“The undersigned has learned that the defendant has violated [this rule] and has informed his supervising officer that he has no intentions to discontinue using the substance that resulted in the violation,” wrote U.S. Attorney Ronald C. Gathe, Jr.

The substance wasn't named in the filing.

YoungBoy has been under house arrest for more than two years.  His trial is set to start July 15.