lagging/frozen with big/complex watch faces

Watch faces that has many layers or complex animation becomes after a few hours
unresponsive after a few hours and even sometimes makes android wear to crash.
Its somehow related to Cards showing up..
A few times at the morning it was frozen and didn't woke up + battery dead.
entering watchmaker setting - card and changing fast a few options there (couple of times) ,
then after disconnect/connect at android wear a few times = this will make the app on the watch
crash/froze/unresponsive and sometimes crushing android wear.