No longer able to press and hold to place multiple blocks

Previous to the recent update I was able to right click and hold to continually place blocks at speed - The faster I moved, the faster the blocks placed (this was awesome) This also included placing blocks vertically up and down. I'm no longer able to do any of these actions and instead have to right click on each block to place it, causing my build times to increase significantly.

I have searched the bugs list and the forums and cannot find a similar issue.
Many thanks