Default [Q] Google Voice typing keyboard with bluetooth - Help!

Device: AT&T Galaxy S4 i337.
Bluetooth headset: Platronics Voyager Legend
Rom: GoldenEye 28 (but this problem also occured on stock 4.2.2 TW)

Issue: Google Voice typing doesn't work with bluetooth headset.
When it's not connected to bluetooth, it works fine if I speak into the mic. When it IS connected to the bluetooth headset, it only works/recognize what I'm saying when I speak only into the phone's mic. The Bluetooh headset mic doesn't kick in during google voice typing. The headset works fine in Google Now or Google Voice search. Just the keyboard portion when I'm in other apps and trying to send off a text..

Any help would be appreciated...