Hi @cuta,
Both breadcrumbs should be able to work alongside, Google uses the first trail found. In most cases it should be the one from The SEO Framework.
In any case, you can ask Google to re-index parts of your website to speed up the testing process.
I’m also using breadcrumbs like NavXT outputs on theseoframework.com
without the issues you’re encountering: this issue is very new for me. So, I went on to do some research.
From Google’s FAQ:
Google does not guarantee that Rich Snippets will show up for search results from a particular site even if structured data is marked up and can be extracted successfully according to the testing tool.
On the bright side, I did find that some pages correctly output the breadcrumbs… here are two examples:


So, I can only conclude that this might just be a fluke ?? Google is pushing hundreds of changes every year to its search algorithm and other things involved.