The IRS has millions of unprocessed paper returns. They are working through these to the best of their ability.
Having said that, I am not sure you will hear back from the IRS since technically nothing changed on the return other than indicating a final K-1 for a member.
I agree that you should just move forward based on the member change and file the return.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
