My near-launch purchased AW3 has never worked with any of my Qi pads. I've used a Qi charging case on my iphone7 for a year or so now and have a handful of random generic pads in different places at home and work. While there have been sporadic reports of some people having success with some pads sometimes, I've seen no apparent pattern.
So you may have been lucky for a bit, but I wouldn't have expected it to continue whether with or without an update.
(and what update came out on Saturday? Thought 4.1 was the latest? .. ah new watch, must not have been at 4.1)