I am a responsible developer for watchOS. Firstly thank you for the bug report. I know about this issue, and it is tough to simulate it. That is a reason why it is still not fixed yet. I have added special logs to catch this error. So, I hope it will be fixed in future versions.
I would lite to ask why it is necessary to reinstall the application? I think just force quit the Windy application and start again should be enough. Can you confirm this, if it couse again?
Thank you again for the bug report :)