I have a strange problem on a WordPress site and after hours of searching I am unable to find a solution: 

A jQuery script (yes, I use wp_enqueue_script and everything is loaded correctly) does what it is supposed to do on the English page but does not work on the German page as can be seen here: http://dev.lindabra.com/lindabra --> click on button "Find my size" / "Meine Größe finden" . 

On the English page all the necessary buttons are created (with jQuery append() function) and the input field values are used to calculate the product size. On the German page jQuery append() does not work and input field values seem not to be available for calculation.

I have tried everything I could find but still have no clue what is going on. Any help is very much appreciated.

Thank you for trying.

Rainer