Credit checking question - E1 9.1

We have an order that was on C1 hold and was released. Prior to the order being invoiced, the order went back on hold. I checked the R42950 version that ran and it is calling a version of P4210 where credit hold is not active. 

A couple of things I noticed -

Between the time the order was released and it went back on hold, the Customer had some invoices that fell into the bucket where it would be placed on C1 hold.

Checking the order, the only thing that was changed prior to it going back on C1 hold was the Scheduled Pick Date.