Your code is confusingly complicated, and we don't know which %Globals entries you are using.

But I think this is the point where you call the $module = "labelupdate" routine

>  $module_map{$module}->($active_modules_ref)

But labelupdate doesn't accept resp. unpack any arguments, $active_modules_ref is taken from the surrounding closure.

This might not be the reason for your problem tho.

But you should really untangle your code to show a clearer logic, if such bugs happen.