Do you have a list of the plugins, or have you tried to do a conflict test on them?
Usually if you start by disabling all and turning on until you find the issue does the trick. I would start by turning OFF your travel advisor one just to see, then clear caches and run your test to see if you have helped the issue.
I’ve also found a plugin that helps with optimization a lot, Hummingbird by wpmudev makes my life a lot easier.
]]>I just deleted the script and it is gone.
Cheers
]]>