This drives me crazy. But every time I hit the link or code buttons in the forum using safari (iOS) the paste icon goes inactive (grey). The text is still on the clipboard, but for some reason between iOS 9.x and the forum software it goes wrong. I am not sure if it's a iOS - keyboard issue or a forum issue. I have only seen this behaviour in this forum. But to be fair, I don't use the paste button much outside the forum and Pythonista. But my bet would be it's the forum