Hecquet is leaving after 18 months on the job, and will be replaced temporarily by Joann Cheng.
The showcase at Les Arts Décoratifs mingles 60 show-stopping dresses with photography, artworks and video.
The dispute was related to contracts of Lanvin designer Bruno Sialelli, who formerly worked for Loewe.
The fashion designer delivered an invigorating speech on Wednesday at the Parsons Paris benefit.
Despite failures, with the speed of China, it won’t be long for a luxury conglomerate to emerge from the world’s largest luxury market.
The French house is making a strong statement this weekend with its Dialogues exhibition, new flagship store and capsule collection.
He replaces Sophie Boilley, who was at the company since 2017.