Ok, so I opened a brand new world and the sand and gravel produced loot. I used MCA selector on the world I was using where I had the original issue and unloaded the chunks outside of my build area and went to several structures and the sand and gravel produced loot. I didn't know that particular area where the trail ruins were had already been loaded since the world was a download with a pre built structure in it. Evidently this fixes the issue, for me anyway. Try that guys and see if it works for you.
Sean Manczuk
Ok, so I opened a brand new world and the sand and gravel produced loot. I used MCA selector on the world I was using where I had the original issue and unloaded the chunks outside of my build area and went to several structures and the sand and gravel produced loot. I didn't know that particular area where the trail ruins were had already been loaded since the world was a download with a pre built structure in it. Evidently this fixes the issue, for me anyway. Try that guys and see if it works for you.