I reworked the menuselect input. Could you try the development version and see if ti works now? (You will also have to update Semantic Forms to the latest version.)
Hi, I installed Semantic Forms 2.4.1 and Semantic Forms Inputs 0.6 alpha but with my previous instance the issue is the same. To have it I need to create a page with a empty field and if I re-edit the page I could have it now.