Unable to mass edit or update suggested buyer on the requisition lines if one line has bpa reference

Summary

Unable to mass edit or update suggested buyer on the requisition lines if one line has bpa reference and other do not have bpa

Content

We are facing a bug ( at least in our mind) that we are trying to mass update suggested buyer but the field is not coming in mass edit screen and we find that it is not coming because one line has bpa reference and other does not have bpa reference. If all the lines either have bpa reference or not have bpa reference then i am able to do mass update of suggested buyer.