Bubble Cloud will lose most of its contact functionality on the watch due to Google’s new Permissions Policy coming into effect in January 2019.

The recommended alternative methods don’t work on Wear OS watches.

Please help bring this to the attention of Google developers by staring the following issue which I created recently: https://issuetracker.google.com/issues/120255764

Update (March 9, 2019)

The restrictions came to effect, but I came up with a workaround for Bubble Clouds (requires installing a free plugin).
See this post: SMS / Auto-populate by recently contacted