Flash drive only mounts when connected through USB hub

I have a PNY 32gb USB 2.0 flash drive, when trying to connect the drive directly to my Mid 2012 MBP (specs attached) the drive never mounts, doesn't list in diskutil as an unmounted drive either, however when I plug the drive into a Micro Innovations USB Hub (old ~ 2002) the drive mounts (albeit slowly).

On my iMac (Mid 2010 I7) the drive works perfectly in the machine or through Apple USB Keyboard.

Any help?