not being able to see glass bug.

So, i was playing Minecraft like normal, i will say ahead that this is mostly a server problem. but it has happened to me on single worlds. when i try to see glass i couldn't. i joining a single player world and i try to make glass. icon is fine its just when i placed it. it wasn't visible, but it blocked my character when i moved to it. like it was there but i couldn't see it. it happens on servers to.