Steps to reproduce the issue

Use showon in an XML-field-declaration in frontend like this:

<field name = "title"
type = "list"
label = "COM_BESTIA_FIELDS_USERTITLE_LABEL"
description = "COM_BESTIA_FIELDS_USERTITLE_DESC"
filter = "safehtml"
default = "">
<option value = "">COM_BESTIA_FIELDS_VALUES_NOTITLE</option>
<option value = "other">COM_BESTIA_FIELDS_VALUES_OTHERTITLE</option>
<option value = "dr">COM_BESTIA_FIELDS_VALUES_DR</option>
</field> 
<field name = "testtest" 
type = "text" 
class = "input box
size = "40" 
label = "Test"
description = "Test" 
showon = "title:dr"
filter = "safehtml"/> 

Render fields in layout-file of the view:

$this->userform->renderFieldset('contact');

Expected result

Field testtest is only visible if value dr is chosen on dropdown-field title.

Actual result

Field testtest is always visible.

System information (as much as possible)

Systeminformationen