Are Waystone drops broken?

I've read of others not being able to sustain Tier 15 waystones and I'm finally seeing this myself. I decided to use my last Tier 14 on an irradiated map and juice it up as much as possible to get some waystone drops. I got up to 400% waystone drop, plus another 50% from precursor tablets so I figured I would get a bunch of them. Instead, I got ONE SINGLE TIER 6 waystone haha. WTF. Why would it be a Tier 6?

I have everything spec'd into waystone drops in my atlas tree as well.

Only thing I can think of is they are just broken right now.

What's the best place to get them, do one of the trials of chaos or sekhemas?