Conflict on stage

After restoring a site (DIVI theme, updated plugins) on a subdomain (stage…) in order to use it as stage site Swift performance seems to cause a problem: modules like the video and the counter are no longer displayed.
I can clear the static css file feature and disable it and then clear the Swift Performance cache and then the elements are displayed. But after visiting some pages on that site and coming back to the start page the elements are gone again.
As soon as I deacitvate Swift Performance plugin the issue is resolved.

Does anybody know a solution within Swift Performance?

Thanks a lot
Klaus

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