Default WiFi failures

My X (Verizon, 4.4.2, stock moto-maker edition) has developed a weird issue with wifi ...

Goes to sleep, and when it wakes up, wifi has "forgotten" all the network settings.

all saved passwords, etc ... gone. It's like you did a data wipe on WiFi.

However ... if you view the wpa_supplicant.conf file, everything's still there.

Turning wifi off, and back on ... no effect.

But ... if you reboot, wifi connects right up .... yep, that's right - no changes whatsoever ... just reboot.

Anyone got any ideas or seen anything similar?
Been playing with android since the Droid Incredible ...