I noticed this problem as well. If you run parallel build of the same job, it doesn't work.
My workaround was to make 12 jobs (Job-Build-1 through Job-Build-12), and it will call them in parallel.
I noticed this problem as well. If you run parallel build of the same job, it doesn't work.
My workaround was to make 12 jobs (Job-Build-1 through Job-Build-12), and it will call them in parallel.