Urgent question about Contact Form 7

I am using this plugin with “Contact Form 7."

Contact Form 7's send-to email setting was being imported, so the messages were getting sent to me (super admin) instead of the blog owners.
To fix this problem, I added the following code (which I found on your forum) to wp-config.php

define("NBT_CONVERT_WPCF7_MAIL_FIELDS", true, true);

That solution worked.
However, adding this code caused many other problems:
On a newly created blog after adding this code,
- Media image thumbnails (/upload.php) were broken, including Woocommerce thumbnails
- 3rd party gallery plugin: all the settings were broken (see attached image)

When I remove this line of code, everything goes back to normal.

Is there any way to fix contact form 7 issue I explained above, without causing these other problems?

I’d really appreciate your help.
Thanks in advance.