OpenAtlas

I.e. I want to add multiple places to a source. At the add list I can tick what places I want to add. It works fine if I just browse the lists, but if I use the search box, I can tick the checkbox but it won't add it to the source. Vis a versa, when I tick some places and searche for another place and tick it and then add it, only the searched places are added.

For better understanding, please wathc the GIFs.