Hi guys
The EB composer can take up to 2 minutes to open on the front end the back end is fine.
Trying to resolve the issue I deleted all server cache stopped cdn cleared browser cache with no success.
The update was installed in conjunction with ES 1.4 I don't know about ES 2.0 beta. But I had to re install my backup which immediately resolved the issue.
No other changes were made to the site just the EB update.
You might want to do some further testing on this update.