New Delhi, Jan. 31 -- Apple is reportedly grappling with a fresh wave of departures from its artificial intelligence division, even as it readies significant upgrades to Siri aimed at making the voice assistant more conversational and competitive with leading chatbots.

According to a new report from Bloomberg's Mark Gurman, at least four AI researchers and a senior Siri executive have left the company in recent weeks, raising questions about internal challenges at a time when Apple is accelerating its generative AI ambitions.

Among those to depart is Stuart Bowers, described as one of the most senior leaders overseeing Siri's development. He has joined Google's AI research arm, DeepMind.

Reportedly, four researchers, Yinfei Yang, Haoxu...