There is already a topic discussing this issue for a while:
Check it out, there is no solution or fix, its noting to do with what settings or sensors you have set as there have been plenty of people who have tried all the settings changes you can think of.
RING support team have told some people and i have recently spoke to them and they have told me that they know the people only mode does not work and they are aware of it and no timescale for a fix.
Offically though no announcement for RING, as i doubt they fully know whats wrong and how to fix it yet.