Sending doesn’t work in Browsers with Chorme engine (Version 5.3.2)

This issue is heavily discussed in older topics, but it seems still not beeing solved. When you submit a form with a browser with chrome enigne only the spinning arrow is displayed after clicking on submit. In FF/Edge… it works fine.
The suggested solution from the developer in old threads is not really usable (disable all plugins…). The issue is related to the JS contactform 7 uses.

I really like CF7 and would avoid changing to another plugin at several customers …