Not sure if it is a bug. But I found my website got lots of errors in google.
The url route is not unique, for example:
domain.com/category/product.html (
this is the actual url)
and
domain.com/product.html
But now, google only indexed
domain.com/product.html
These two urls are both opened and appointed to acutally one page. If one module is appointed to different menus, the web will be out of order.
url from your demo site:
joomdonationdemo.com/eshop
/cameras/digital-cameras/canon-eos-digital-rebel.html
and
joomdonationdemo.com/eshop/canon-eos-digital-rebel.html
You can see that, without category name, the url also could be visited.
Ray