veselinovm Hi
Kindly let us know for the following points which would help in narrowing down and troubleshoot the relative issue :
1) Kindly confirm if the issue persists when you add custom fields for specific product listing and assign default Joomla template
2) Also, Does the issue persists as shown in screenshot if you disable the template override folder by renaming it i.e./templates/ja_autoshop/html/com_virtuemart