Version 12.0.2 (14606.3.4) –> date did not work

Hi,

I use in my contact form 7 “[date* date-535] – [date* date-537]” (date from – to). It works fine in Firefox 64 and Google Chrome Version 71.0.3578.98 (Offizieller Build) (64-Bit) and Opera Version:57.0.3098.106.

It did not work in Apple Safari (desktop) Version 12.0.2 (14606.3.4).

What can I do, that [date * date-535] works in Safari?

Thank you for help.

The page I need help with: [log in to see the link]