Stuff reported that Plunket had been asked not to return to the station, but that he might fight it.
Plunket told the Herald he was still employed by the company but declined to comment further.
A MediaWorks spokeswoman said she couldn't discuss individual employment matters.
Plunket hosts the show Magic Afternoons with Sean Plunket weekdays from noon-4pm.
In December, the Broadcasting Standards Authority rebuked MediaWorks after a May 6 Plunket interview with Te Whānau ā Apanui spokesman Louis Rapihana on Covid-19 checkpoints.
The BSA said the interview amplified negative stereotypes about Māori and had the potential to cause widespread harm.
At the time, MediaWorks said it accepted the BSA's decision.
"[We] understand the comments made during this live broadcast could have caused distress, and for that we apologise."