When I place a block of any kind, it takes some seconds to appear. I can still interact with it when it is invisible. When I destroy a block, it takes some seconds to disappear. I can fly/walk into the block even while it is there. When opening/closing doors it does the same (when opening, looks closed for some seconds, when closing, looks open for a few seconds. I can still walk in the door when I open it and it looks closed, and when I close the door and it looks open it will still not let me walk through. I have not tried trapdoors, pistons, etc.

The block I placed should have appeared instantly, or disappeared instantly when destroyed.

It took some time for the block to appear, and it took some time for the block to disappear.

Ways to cause bug
1. Place a block. It will take a few seconds for it to appear.
2. Destroy that block. It will take a few seconds to disappear.
3. Open/close door. It will take a few seconds to do both.