I get it that things don't work the way they used to and it is frustrating.  The mortgage interest deduction worksheet worked perfectly through 2019 and then in 2020 and now in 2021 it is useless.  I have repeatedly complained but realistically, it is so low on the totem pole that Intuit has bigger issues to deal with.

I would imagine this is the same.  But look, if I am understanding your problem, it is simple to work around it.  Yes, I get it that for $7000 you shouldn't have to work around it.  But just do this.  Enter the name of the brokerage on the 1099-B worksheet.  Then enter the totals in the Quick table Box (A,B,C, etc).  The table will populate just fine for this broker.

Then open another 1099-B worksheet with a different name.  Rinse and repeat as often as necessary.  You will get your totals by broker, with the grand total showing up on the Schedule D.  If you get caught up with the dates, use 12/31/21 as the sale date and Various as the purchase date.