You've absolutely no idea. I got certificates of residence when on OA with no 90-day reporting. Let me repeat: THEY DON'T CARE. Once you've left and re-entered it resets. 😂😂😂
They probably just didn't like you so they used that as an excuse. Landlords can pick and choose who they want. That can be based on anything, even skin colour. Visa type is irrelevant
BronzeMango4148 Good for you. In that case you have nothing to worry about,but you've posted a long comment about how you've been downgraded to a 60-day entry, so I'm wondering why you bothered posting?
Applying for a certificate of residence has nothing to do with historical 90-day reports. It obviously worries you sick, so do what you think is right.