Ubuntu: external links always bring up the "open with" external apps window

Expected: clicking on a link that is supposed to lead to an external application (file:///, zotero:select… etc) should directly open that link by the default system application for that link type.

What happens instead: every single time Obsidian brings up the system menu which forces the explicit choice of the application to open the link with. Even if there’s only one application on that list.

There doesn’t seem to be any expicit setting for external applications.

Ubuntu 18.04, Obsidian 0.15.3