I realized since the last beta that the generation of diamonds in the world was reduced considerably, requiring several hours of searches to find bubbles with 1 or 2 diamond ores. The same problem persists in this beta. I did an experiment using the / fill command to remove the remaining elements from the region in an area x 38 by z 41 in width and from layer y 20 to layer y 1. The result is in the attached image, I took the liberty of marking the diamond ores with a restone block for easy identification and I fit them in a single screenshot.
If anyone else can, please take the appropriate tests on a map to see if the problem is only on my map or is common to all players.
If you identify that this is due to some error of mine please inform me, I appreciate it.