Sorry for the late reply! We have not seen any issues related to connectivity with iOS 16.2 so I'm not sure why this happens.
However, there is a workaround that can fix these instabilities and that is to "Enable Location Services" in the Settings. What this does is it is registering the Flic app to be woken up on what iOS calls a "Significant location change". This is a good way to kick the service back into a working state.
It should not really be needed but it has proven to solve these kinds of rare issues before.
One side note is that this will deliver your approximate location to our app and iOS will show you a warning about this but I can assure you that we do not upload this location anywhere, it is purely as a workaround for getting back into a running state.
Hope this helps!