We currently do not support http://localhost due to restrictions from Safari in iOS version 10 and higher. To make sure that your website loads properly, with local enabled, we modify the URL to http://bs-local.com. This will help load all the assets in an expected manner.In case of manual testing sessions, if you are not able to reach http://localhost from Safari in iOS version 10 and higher, try directly using http://bs-local.com.
In case of automated tests, if your API requests fail while accessing http://localhost endpoint on Safari in iOS version 10 and higher, you can change your endpoint to http://bs-local.com for all your API calls.
Thank you for your co-operation in understanding the limitation.