Had this behavior also : phone was 'resuming' before displaying the home screen after unlocking - very annoying. And the home screen would sometimes be frozen for a few seconds before I could scroll it. And a bunch of other problems.
Unregistered the Tetra lockscreen, did not need to uninstall it, and phone is now much more fluid, no more 'resuming' for the home screen. Apps are still resuming all the time, but that's another story...
Hopefully, they can update this app to make it play nice, it's a nice 'wow' feature and actually useful.