Firefox is broken, Chrome and Edge works fine.

[gumbarros]

Edge:

Firefox:

min-width workaround just for firefox.

.search-box-menu{
 width: 100%;
 min-width: 18.75rem !important;
}

Our typeahead initialization:https://github.com/JJConsulting/JJMasterData/blob/main/src/Web/Scripts/SearchBoxListener.ts

If you want to repro, create a SearchBox in a form at https://www.github.com/jjconsulting/jjmasterdata

[fcandidotech]

I had a similar problem in my aplication, would be a great fix.

[LucioPelinson]

+1