I have a Samsung Galaxy S5 (SC-04A), running Android 4.4.2, and it is rooted but still has the stock ROM that it came with when I purchased it. This problem has existed since before rooting the phone.
I leave the phone in its charging cradle over night. When I wake up, the phone is not connected to my home wifi network.
I have looked at the advanced wifi settings, and the option "Keep Wi_Fi on during sleep" is set to "Always". I do not have any "Wi-Fi timer" set. I can't see any other options that might make my Wifi disconnect.
How do I ensure that my Galaxy S5 is staying connected to my home network, and in general always maintains a stable connection to any network?