I don't know if this is related to the beta version or not but I came across this kind of problem.

[If it's too dark to see, what I'm seeing here is an iron ore missing one of its sides texture (I'm assuming) and instead, showing the void]

Sometimes, some blocks can have broken textures (I'm assuming) and instead show the void. The block I'm talking about in the screenshot is an iron ore.

This is not really a problem for many but sometimes, it can be annoying. Please fix if can!

Also, if this kind of bug has been reported multiple times before, you could just delete this one