Why is federal tax withheld on 1099-R forms in TT different than in Form 1040?

I posted the following as part of a longer question:

 

IRS says "Payments you made" is slightly less than "Taxes you owe"; amount due.

… but I think the question here is granular enough to ask on it's own.

 

Status: Married, filed jointly. Form generated by TurboTax: 1040-SR.

 

The total of federal tax withheld from 1099-R forms, as shown in TurboTax ("My Tax Data"), is about $1,000 greater than the amount in Form 1040 Payments, Form(s) 1099, line 25b.

 

Is that to be expected?