Lg G3 automatically turns on speaker phone during calls

[Android Central Question]

My Verizon LG G3 has started automatically turning the speakerphone on during calls. It's driving me nuts having to turn it off plus it disconnects my bluetooth headset making it impossible to use. The phone has been rooted since shortly after I got it. It is still on the stock rom that it came with. I blocked auto updates for fear of losing root. Any ideas on how to fix it? Also, the phone has gotten terribly slow.