We have a Team managed project (not company managed) and it shows Open issues well on Sprint of Backlog.

However, Backlog section does not show Open issues.

This problem started when we removed Open columns in Board (kanban) and added Open column back.
In details,
before we removed "Open" column at first in Kanban, both Sprint and Backlog sections of Scrum (Backlog) showed Open issues.
after we removed "open" column in Kanban, neither Sprint nor Backlog sections of Scrum showed Open issues.
After we restored "open" column in Kanban, only Sprint shows Open issues while Backlog does not show open issues still.
Thanks.