Hello, Tom,
Thank you for purchasing our theme and for contacting our support center.
We recommend that you navigate to XStore > Theme Options > Speed Optimization > Menu Cache, Static Blocks Cache, Remove Query Strings From Theme Static Resources, and set them to Off.
As we can see, you are using CDN, try to temporarily disable it and check how it works then.
If you have any additional questions or concerns, please do not hesitate to reach out to us. Our support team is always available to assist you.
Kind Regards,
8theme team