Galaxy S6 :: Unable To Unlock Phone With FitbitGPS Running

I have a Galaxy S6 T-Mobile version that I have had for about 2 weeks now. So far I have been pretty happy with it, specially as I came from an iPhone 5s. However I am having an issue that is really annoying.

I have a fitbit charger hr tracker connected to the phone. When I use the activity tracker function of the fitbit app I am unable to unlock the phone at all. The screen stutters and takes a while to fully load when pressing the button and the majority of the time it will fade out, not even giving me the ability to use a fingerprint to unlock or to swipe if the smart unlock is on.

As this point, I am not sure if this is caused by the fitbit app or if it is the GPS that does it. With the exception of the rare time it unlocks for me, I need to restart the phone each time.

I went ahead and cleared both caches, after looking up how to do it. Unfortunately it does not appear to have worked at all. I am seeing the same symptoms. I noticed a further symptom as well. I started playing music during a walk and the bluetoothplayback was periodically interrupted. A stutter of some sort.

I will next be ruling out BT issues using wired, as I have never had issues with this headset before I think it is related.

The other thing I noticed was that I was able to put it into airplane mode and while still stuttering severely, I was able to unlock the phone though with much hesitation. My next step will also to be trying this same task without the GPS on, seeing if that makes a difference.