Hi,
First of all, the fix to close a popup first and then refresh objects really is a big win, better performance, less confusion for the end user because they no longer see a popup briefly change its contents before closing.
However, Chrome does complain about some of the new features and suspects insecure behavior. Not sure whether those complaints were also in 6.7.x:
Mixed Content: The page at 'https://url.mxapps.io/index.html' was loaded over HTTPS, but attempted to connect to the insecure WebSocket endpoint 'ws://url.mxapps.io/reload/'. This request has been blocked; this endpoint must be available over WSS.
Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('https://home.mendix.com') does not match the recipient window's origin ('https://url.mxapps.io').