The news outlet, The Verge, pointed out a problem which comes in the form of discontinued cellular connectivity from time to time when using the Watch. Anyways, Apple announced that they have taken note of the issue which is as a result of the Apple Watch 3 joining an "unauthenticated Wi-Fi wireless networks without connectivity, it may at times prevent the watch from using cellular."
The connectivity problem seems to defeat one of the purposes of the features in the Watch which is to stick to a cellular signal than seeking public Wi-Fi Networks. The Good news is Apple says it's "investigating a fix for a future software release."
We don’t know when a fix will take place but hopefully when it does, hope it clears this impression.