Phone as presence sensor constantly arrives & leaves

I use my iPhone and presence sensor and suddenly this evening app constantly keeps reporting as the phone leaving and arriving instantly? My partner has an android and hers seems ok. Anyone else seen this issue?

It could be a result of your location jumping around. What reporting time length do you have set? Maybe increase it?

I have a fairly wide area set as home so it shouldnt jump around. its set to 2 mins.