[Hummingbird Pro] Some conflict somewhere maybe with Themify builder

For some reason, when Hummingbird plugin was being used we are getting display issues with the site. So disabled Asset optimisation & cleared cache after advice from Chat support.

But we ran into further issues after doing this which is now preventing us from using Hummingbird plugin at all, and we have to leave it disabled currently otherwise after a few seconds after activating, the site goes into a 503 or we get a DB connection issue.