Add version not working properly for Qumran Sectarian Manuscripts search results

Much of what is present in the Qumran Sectarian Manuscripts is also present in the Dead Sea Scrolls Study Edition. When searching the QSM, if you select "Add version" and then add the Dead Sea Scrolls Study Edition, no results appear, as can be seen here:

Yet, all of these texts are present in the DSS Study Edition. Here is one of them. When selecting a particular search result with link set activated, they both navigate perfectly together:

So, anyway, it would be nice if the DSSSE and the QSM were compatible in the search results using the "Add version" button.