<div class="ts visible static vertical menu sidebar">
<div class="basic item">
<div class="ts fluid right icon input">
<input type="search" placeholder="Search">
<i class="search icon"></i>
</div>
</div>
</div>
Result:

input style to width: 140px (if sidebar width 230px);.wide or .very.wide classes;.thin or .very.thin classes;I don't see any problem with the code you provided and the example.
Maybe it's the browser bug and it might been fixed already?


Same result in playground today. :thinking: