IDs of a list box change when using method setSelectedValue()

Hello DesignStudio Community,

we are having a weird issue with the listitem-keys of a list box. Follwing scenario:

We are building a menu with a list box and adress the list items via their key using CSS like in that:

#LISTBOX_MENU_ddlb_LB-listUl #__key0, #__key1, #__key6, #__key9, #__key11 {
font-weight: bold !important;
height: 20px !important;
text-align: left !important;
padding-left: 5px !important;
}

The list is 14 items long at the moment, using key0 to key13. Everything is fine so far but when using the method setSelectedValue() as in LISTBOX_MENU.setSelectedValue("line_activities"); the keys for the list items will transform into key14-28 so the CSS will not apply anymore.

Additional info:

Using DS1.6 on BIplatform 4.1 and BW Backend 7.3

Does somebody have any idea about that?

Regards,

Nils