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I'd just call your previous lender and ask them to update pdq showing:
As per Experian report (it's similar on Tu and Eq reports as well)
$0
paid/closed
and status as:
Account transferred
to another office
Ours didn't report until 5 months after Wells Fargo quit reporting. DH's scores took one heck of a dive for those few months. It'll all work out, just don't app for anything til it's all straight for like two months....well you know that I'm sure.
Dh lost and then gained the 40-50 pts. immediately upon new mortgage company reporting. That's how I found out they finally did, alert from Exp congratulating his score improvement. But yeah, call the old lender and ask them to report the updated status and let them know it's tanking your scores and how. Maybe they'll off cycle for you, but at least clean it up.