BelgianNtwari failed to instill confidence at Chiefs, after struggling to keep clean sheets.
In the seven matches he played for the Glamour Boys across all competitions, Ntwari conceded 11 goals and avoided conceding just once.
He was eventually demoted, with Petersen and Bvuma getting their chances.
Rwanda coach Adel Amrouche, who served as the general director at newly crowned Belgian champions Royale Union Saint-Gilloise, has since defended the 25-year-old, terming him the best on the continent.