Combo inside of switch fails to resize properly

If you remove the switch and case the combo box sizes properly as you change the size of the explorer window
But with the switch and case in place the combo box does not resize and you loose the down arrow...

<xforms:switch id="TabSwitch">
<xforms:case id="caseAccountDetailsTab" selected="false">

<div class="tab-head">
<xf:select1 ref="y" class="subtab">
<xf:item">
<xf:label>Work Profile</xf:label">
<xf:item>
<xforms:label>Endorsement Details</xf:label">
</xf:item">
</xf:select1">
</div">

</xforms:case">
</xforms:switch">