After the production order job is started, user want to increase other route resource quantity, and then update the route and reschedule the production order. Resources are not assigned to the updated jobs. Only users click job update on production all jobs form and then re-schedule the production order, we could see resource has been assigned to updated jobs.

reported this issue in issue 947150 and this is not considered as bug as production route -> functions -> update route renumbers operations and recomputes the level (sequence).

all jobs -> functions -> job updating recreates jobs however does not auto re-schedule. Re-scheduling after route is already wip is expected to be explicit and intentional. Therefore manual re-scheduling is needed to allocate the additional resource split for the operation. Rescheduling after job updating is suggested as a workaround that resolves the job resource allocation.

There's a bit of manual work involved here and product team suggest to create a ideal.