Expanding a single story swimlane down arrows seems to have dissappeared is there a settig for this?

[BMT SMART]

The down arrow that appeared under the story in a sprint or the backlog used to open up the tasks that sit under the story .

On Monday we logged in and that is no longer available. We can expand and collapse all swim lanes but not an individual one.

In anticipation

Stella Arch

BMT SMART Fareham UK

[Warren]

See this question raised earlier about the same issue