It seems that the job was not defined within the bundle but separately (either via cli or UI).
In that case it makes sense.
When creating a bundle, I'd put everything related in that bundle (notebooks, py files, jobs) and check that into git.
Basically there should not be a separate job and bundle branch.
I don't know if that makes sense?

If you use the UI you can always show the generated yml like this (Open configuration):