This happened while I was playing in a mod pack called Fabric Tricky Trials that has the version 5.11.0 of tech reborn. I mined any ore with an iron pickaxe or lower and they didn't give me anything but experience. So, I don't know if is a problem of the mod or of the mod pack, that is why I'm complaining here, because I don't know and I saw that you published new version, so maybe in that version there is an error that makes that happen.

Update techreborn, this was fixed ages ago.