Scrapping legendaries and not getting any mods.

So I may be expecting a lot, however I feel like this is taking way more work to get. I'm attempting to get the Unyielding mod (craftable preferably). I've saved 11k script, and waited for a discount purveyor weekend to blaze through and get just 1 star armor to try to get it. I've already gone through about 6k script+ and scrapped 40+ unyielding pieces out of that and haven't seen anything. I am not shocked as much about that, but even the other 1 star mods like Regenerating, or Weightless, I haven't gotten a single mod box from any of my scrapping efforts. In fact, I haven't seen any in a couple weeks. Is it broken?