In 1.18.0.20 I ran into a couple of ore Veins that had way too little iron ore mixed in with the tuff and a whole lot of Tuff.

What I expected to happen: find an Iron Vein and dig it out to find a lot of iron along with a lot of Tuff like I did a couple of Beta's back.

What actually happened: I dug down into a cave system that had a vein of almost pure tuff that is supposed to have iron ore and iron ore blocks mixed in. While it had a very small amount of iron ore it didn't have as much as I expected and it was a huge vein of Tuff that I was mining.

Steps to recreate:
1. create a world in the 1.18.0.20 Beta.

2. Mine down and find a iron vein.

3. Dig out the vein to see that there's not much iron ore where it is supposed to be.

I know that the generation of the world and ores was changed to match Java recently and that may have introduced this bug.

I did a search on this but didn't find any reports before I made this report.