The 23-year-old player was loaned out to the Lions of the North by the Buccaneers at the start of the current season.
However, Hlongwa found it difficult to break into the team's starting line-up and he has since left the Tembisa-based club.
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Highlands Park announced the departure of the promising player on Thursday afternoon.
A club statement read: "Highlands Park FC has released defender Brian Hlongwa, who was on loan from Orlando Pirates."
"He joined the team at the beginning of this season 2019/20, although he wasn't a regular starter, he was on the bench in the MTN8 final against SuperSport United.