Hi @MikeyB! Have you checked for any Ring app updates available? Removing and reinstalling the Ring app on your mobile device might also help with this. If wifi signal and other operations are working as intended, but motion/ alerts are being missed, the next best step is to check motion settings.
I recommend checking in your Ring app for settings such as People Only Mode, or even motion scheduling, modes, and other motion/ alert settings. Feel free to let us know if this works for you! 