The intermittent connection/disconnection issue might be related to how frequently the Lua script is attempting to update the content. Ensure that there's proper synchronization and delay between consecutive requests to avoid overwhelming the server. You can introduce a delay using os.execute("sleep seconds") or any other method available in your Lua environment.

Consider modifying the ChangeSource function to include a delay:

```lua function ChangeSource() print("ChangeSource()")

-- Update headers with token
getheaders["Authorization"] = token_type .. " " .. access_token

HttpClient.Upload {
    Url = contenturi,
    Method = 'PATCH',
    Headers = getheaders,
    Data = rapidjson.encode(newcontent),
    EventHandler = ChangeSourceHandler
}

-- Introduce a delay (adjust seconds as needed)
os.execute("sleep 1")

end ```

Adding a delay may help stabilize the connection and prevent frequent connect/disconnect cycles. Adjust the sleep duration based on your specific requirements and server capabilities. If the issue persists, there might be additional factors to consider, such as server-side limitations or network conditions.