This, like every other time is a sample size issue :)

Considering you're only 22% to see Regen drop each FK run, this is pretty normal. 

Also do note that if you are running on auto and have auto-sell filters applied, like most of us do, it's very possible that you did in fact get plenty of regen gear, you just had it get auto-sold.

Autosell got me good a few CvCs back. Forgot to turn it off from Spider silver farming and did like 100 FK runs before I caught it. lol

This. Nothing like running a ton of Super Raids and having no artifacts to show for it. 😭

Its empowering for mid gamers when the mighty admit their noob mistakes.   lol