Default WiFi disconnects

I've been using a few of the KitKat ROMs (Gummy, AOKP, Vanir) on my vs980 and occasionally my wifi will quit working. It says it is still connected to my router but browsers fail to connect to servers. Also when leaving my car, I turn off BT and turn in Wifi and most of the time I have to reboot to reconnect wifi. I've tried stock kernels and paek5.2 and it doesn't make a difference. Any ideas?

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