BT value set by next node not ?

Have set a BB int value to 1 on a service but by the next node is still 0 ?

Edit: … Just to clarify, the value was set by a service to the BB in a selector node, then trying to get it in a task.

Also have tried another key which is a vector and passed fine.

Is there a depth limit, have 1 service in a selector, then branching to another service in a selector below ?