The image below displays the block having a physical albeit invisible form visually for a manner of seconds and its texture revealing after said seconds are up. Though this has happened recent, and yes I use mods, but I wouldn't say it is because of said mods, as playing on Singleplayer does not yield this same result.
One of my pals, suggest its like a server tick thing, but I am unsure of any of that, I just host the server.