If you formally renounced Chinese nationality then I would expect you to have lost the right to a RHP at that point. As I understand it, you can't have an RHP if you aren't regarded by the Chinese authorities as a Chinese National. If you had lived in HK for 7 years at the point you renounced Chinese Nationality then I would expect you to switch to ROA through residence (and get a new HKID without the ***). Then, yes, I would expect you to lose that ROA after 36 months absence as above.

But this is not something I have direct experience of - better wait for a Chinese HKer to drop in here.