Investigate the root cause and submit a fix of the following issue:

During my test with antigravity on substrate, I sometimes got a response cut mid-stream in a turn, and the next turn continues the stream response from the previous turn. For example:

• User: what about LA?
• Harness: It
• User: what about LA?
• Harness: appears that weather information for Los Angeles (LA) is currently not available.
  Weather information for Los Angeles (LA) is unfortunately not available in the weather
  database at the moment.
  If there is another city you'd like to check, please let me know!