Pick Block (Middle Button) doesn't work since upgrade to server 1.13

Upgraded server to 1.13, now middle buttons does a weird movement.  First it turns your character, usually to look down, but sometimes to the side.  Then it picks the block.

For Example: I'm looking at my fence, press middle button to choose a fence block, but then my character looks down, then it picks the floor block

Workaround: assigned pick block to a keyboard button instead