Darstellungsfehler Safari

Hey MaxBlank,
Thanks for your patience, is this the only page that it occurs on? I looked at some other pages and they seem fine, I see you have a membership plugin form on the page, is this added with shortcode or a code snippet?
Have you tried disabling your plugins to see if there is a conflict?

Best regards,
Mike

Hi,
Thanks but your screenshot is not working, nonetheless please include an admin login in the Private Content area so we can investigate, can we also disable your plugins while we investigate?
As I understand this is the only page with the error so perhaps the error is with an element on the page, we may copy the page to a new test page to investigate further.

Best regards,
Mike

Hi,
The login doesn’t seem to be correct, please check.

Best regards,
Mike

Hi,
Thanks for the login it seems that Safari was having trouble with calculating this css:

div .av_one_half {
    margin-left: 20px;
    width: calc(50% - 10px);
}

I have adjusted it to this and added it to your WordPress ▸ Customize ▸ Additional CSS

#top.single-product.postid-14655 div .av_one_half {
    width: calc(48%);
}

and now your page is showing correctly.
I created another test page with just two half columns and they showed correctly calculating the calc(50% – 10px); so I believe there is a conflict with a plugin or some customization but I was unable to examine your child theme files. I see you have some side button links going to products but I’m not sure if this is related or if it is something else.
I see that this is your only product built with the Advanced Layout Builder so you could just leave the css in place, or if you are going to create more products like this remove the pasg ID from the css .postid-14655 and it will work for all of your products.
Otherwise if you want to find the conflict, try disabling all of your plugins. If that resolves the issue, reactivate each one individually clearing your browser cache between each one until you find the cause. Or switch to your parent, if this solves then it is related to a customization in your child theme so you will need to investigate there. It seems to be related only to products because in my test on a page the column worked correctly. It is strange the issue only occurs in Safari.

Best regards,
Mike