Cached ESI can not be shared across pages/siteaccesses due to "pathinfo" property

Currently, when trying to put an ESI block in cache, the block's resulting fragment URI will contain a "pathinfo" property with siteaccess-specific info, effectively preventing the cache to be shared across siteaccesses. This only happens when using the URIElement matcher, there are no problems when using a hostname matcher.

Please provide a suitable solution to deal with this.

Edit: also sharing across pages is imposssible