Attempt to resolve wrong element full name issue

Trying to find solution to this: https://github.com/Fabrik/fabrik/issues/531

Unfortunately there is also an issue with URL query when the filtering element is in joined group. The following error messages were returned when using this method to add new data:

This form uses joined data, but its foreign key teos_mus_plk_lang_t___teos_mus_id is not published. This will cause issues when saving the form. Please contact the site owner regarding this issue.
Notice: Undefined index: teos_mus_plk_lang_t___id in /home/...../components/com_fabrik/models/form.php on line 4432

The first mentioned element is actually published.
Line mentioned here is
`$repeatGroup = count($origData['join'][$joinTable->id][$smallerElHTMLName]);`