Wikimedia Bugzilla is closed!

Hello,
when i insert a field with the input type category or categories this way:
{{{field|Category|input type=category|top category=MY_Top}}}

Then sometimes when the form is loaded I don't get the checkboxes. They are missing and just the text is display. After reloading the for several times everything looks fine.

In the developer tools from firefox I found this message:
"mw.loader::execute> Exception thrown by ext.semanticforms.dynatree: $.widget is not a function"