Question about the Safety data Sheet Subsequent shipping

Dear EH&S experts,

I'm trying to fix an issue we have after the implementaion of the SDS manual shipping ;

Issue description : the subsequent shipping of Safety Data Sheet is not working.

I think I'm following the full standard in terms of process :

I flag changes as relevant in my real substance and when I generate a new version of a SDS (Version +1) , it's aslo defined as relevant changes...

In my generation variant, I have also set the "change Marks" option to 2 (Change Mark If Specification Exchanged).

In consequence, the SDS are not resent automatically....

It would be great if somebody could suggest me an idea on this question.

Best regards

Nicolas