Okay, a couple of days ago I stopped turning off the Vox and just pushed the on/off button to put it in sleep mode. I didn't turn the WiFi off because I now had it set to turn itself off in sleep mode. The last couple of nights I even plugged in the charger overnight in sleep mode and the battery fully charged in the morning from less than half the night before.
This morning I used it just a little and the battery showed almost full when I put it in sleep mode. Just a few minutes ago this evening I tapped the on/off button and it didn't wake up. After pressing it for 10 seconds it booted up, but the battery was only half full! So, it looks like I'm having the same issues as the rest of you. Anybody who says they don't have the bug, just hasn't seen it yet.