No synonyms in Multiterm layouts

For the first time since I can remember, I decided to create a custom layout in Multiterm. My termbase contains only two languages. When I started testing the new layout, I realized that I was not seeing all my terms. Precisely put: no synonyms are displayed. In the same vein, it is not possible to add synonyms.  I do not see any way to change this. Is this a bug or the intended behavior?