select2-search--inline is limited by 177px which prevents select2 display a long placeholder.select2-search__field is set 100%, it really extends 100% without limit.Thanks Sean,
It works perfectly.
Glad to hear that  Please let us know if you need any further help.
 Please let us know if you need any further help.
HI,
Thank you for the heads-up.
We will fix this in the next update. In the meantime you can edit src/sass/vendors/plugins/_select2.scss and add flex-grow: 1; to the code section in line 77:
// Search
.select2-search.select2-search--inline {
flex-grow: 1;
}