Hi

yes it's probibly another package setting 'use strict' ; at a global level and when the scripts are stuck together it's conflicting :(

I would search the App_Plugins folder for 'use strict' and then see if there is a script in there where it is set at the top of the script and not wrapped with a function.

if you see something like

'use strict';

function modulecodefunctions() {
}
...

this file is your problem.

ideally anyone useing strict should wrap their code

(function() {
    'use strict';

     // pluging code here 
})(); 

so if you see it like that then it's not the file causing your problem.

to test you could either

a) remove use strict from the start of any plugin scripts that are declare it outside of a function.

or b) wrap that file in the (function() { })() syntax.

remember to increment the version in config/clientdependency.config once you have made any changes.

I would also drop a post into the relevant forum if you happen to find out which plugin is causing the issue (crossing my fingers it's not one of mine)