I ran into this issue also. What I had to do as a work around was to add my late husband as a joint holder in the initial My Info section and then I saw the check box for the joint account in the interview for form 8938. After unchecking the box (since I am the sole owner of the account now), I went back and deleted my husband as the joint filer. Hope this workaround works for you also.
Also, I am surprised the software glitch hasn't been fixed so far even after you made the complaint early 2020.
