Hi there,
It started Wednesday evening for us to, but it was a sudden drop of 80% from 18:00-19:00 and has stayed at that level since according to both Shopify Live View and GA. Our sales have also dropped accordingly, although strangely our Google Ads shows the same number of impressions, clicks and cost not sure how that can be the can be the case. I have raised support tickets with Google also, but no response as yet.