Hi,
I think that the problem was not completely solved.
Removing the following line from the template Helix Ultimate
<link rel = "canonical" href = "<? php echo JUri :: getInstance () -> toString ();?>">
I get that Hika products just show one canonical url, ok url canonical product, but all other content that is not from Hika, the html does not show any canonical url (articles, etc ..)
I have tested this situation on 2 sites with the same results. From my point of view, I believe that the communication is not correct between Hikashop and JoomShaper at the time of building the canonical url, but I don't know where the origin is
Best regards
Javier