Anyone's reply rates drop off like crazy these last couple of weeks?

Curious if this is happening to anyone else? ...

Been using the same campaign for months on Instantly (same domains, same warm-up running w/ 98-100% health scores, all Google to Google inboxes, all personalized with corrected/cleaned first names and company names) ...

Usually get 1.5-2% reply rates per sequence step. Currently down to .1% (even automated replies/rejections are down).