Default Sprint LG G3 not showing any cell sites in the Llama app

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When I open the llama app, the recent tab does not show any cell sites. It only shows no signal/unknown or :-1:-1:-1 which I think is just the default for when setting up a new phone. I even clicked on the areas tab for home or work and start learning area for 4 hours or so. The only time when I can actually catch cell sites is when I turn off lte and only use 3g data. I'm not sure why the LTE data mode would not be able to capture any cell sites. My phone is rooted with stump root and I have made a few tweaks with G3 Tweaksbox. Other than that not sure why the sites aren't captured.

Can someone else test this on their Sprint LG G3?
Thank you