Hi Rose,
our development team had a look and created a fix.
For future reference, we use WP Business Reviews (https://wpbusinessreviews.com/). It seemed to be an error from Xstore’s static block cache. Deactivating this feature solves it.
–This seems to be a bug in the static blocks / theme conflict with the ‘nested’ shortcodes
When the code of customer reviews is added ([wpbr_collection id=”8141″]) directly to the page, the review slider appears twice.
Could also be in the testimonial plugin that doesn’t support this.
As a fix, we have now put the code of the static block directly in the shopping cart.