Why can I not see my active sprints in the Backlog?

[Matt Darwin]

We have a large JIRA project.  There is an active sprint with lots of tasks in it.

A colleague and I have created some tasks, and these all have the  "Scrum Team" field set to the name of our sub-team. 

Looking at the backlog page of our board, we can see our tasks (and only our tasks, since the filter query includes a filter on the "Scrum Team" field).

However, there is no sprint visible in the backlog page, and when I right-click on an issue in order to add it to the sprint, there is no such option on the dropdown menu.

[Jobin Kuruvilla [Go2Group]]

Check if the Sprint field is available on your issue type. Also check if you are able to edit the issue and add a sprint on the edit screen.