I bought the official LG wireless charging stand for the G3 a few weeks ago and it was slightly hit or miss. The latest software update I've had (10h) seems to have improved things. One thing I've found that improves the reliability of the charging process and doesnt have the wireless charging message continuously popping up is placing the phone down to charge while it is awake and on the home screen. Then when the wireless charging message pops up, dismiss it by tapping the screen and waiting a few seconds before locking the phone by double tapping the status bar. That is what I have found that keeps the phone quiet throughout the night.
LG G3 D855 (Int/UK) - Rooted Stock LG 4.4.2
HTC One M7 (801n) - S-OFF, CyanogenMod 11 (Installer)
Sony Xperia Tablet Z (SGP311) - Rooted Stock Sony 4.4.2
Asus Nexus 7 (grouper) - Stock 4.3
HTC One X+ (Int) - ViperOne 2.1 (4.2.2)
Samsung Galaxy Note N7000 - Ultimate N7000 XXLSC
HTC Desire HD - Android Revolution HD