Android Wear glitch forces apps to close unexpectedly
There is a solution. The person who filed the issue has a workaround for developers, which requires them to follow certain instructions so that their apps won't open in the offending full screen mode. Adding the following directions will apparently block the new cards created from the pedometer step count, from shutting the app down.
The reason for the shutdown of the app has something to do with the watch sensing movement and wanting to add to the pedometer step count, causing a new info card to be shown on the home screen. This interrupts the full screen app and closes it. Surely an update will be sent out soon that will resolve this conflict. Until then, developers, you know exactly what to do.
source: Android via AndroidAuthority