When Im in my city world in creative, sometimes when i place a block the block glitches and it is placed, but it doesn't show it but you can select it. Then a second or more secs later, the texture appears.
This can happen with the following blocks:
Fences
Quartz Blocks
Please fix this bug.
Environment
Windows 7, Java 8, 2.93 GHz, 64-bit.
This issue has been returned in 15w41b.