Sign Writing

Hello so the bugs currently killing my Minecraft experience are as follows 

Bug 1.

I am unable to name any Minecraft signs, it does not matter what wood you make the sign out of. Placing the sign is fine and it lets me write in what I need but upon exiting or pressing ESC the writing is there for a second and then disappears, this is very inconvenient, it also does not matter how you place the sign still no luck.