Display of keywords


I have a question about the keywords:
If the keywords in a particular language are not set, they will not be displayed on the landing page in that language either, even if the keywords in the primary language exist,
In the case of the abstracts, however, it is different: the abstract of the primary language is displayed.
Is there a reason why OJS handles keywords and abstract differently?
Wouldn’t it be better if the behavior were the same?