Custom permalinks not working since Gutenberg’s Update

Hello, I use to structure my website in folders and I customize the slugs of pages and posts with custom permalinks plugin. Before the big WP update 5.0, I could write in the slug the url I wanted, for example: mywebsite.com/folder1/post-title/ but now, when I try to do this I get an automatic transformation to: mywebsite.com/folder1-post-title/.

I can’t put any slash “/” because WP transforms it to “-” losing my folder organization in the url.

Do you how can I fix this?

It stopped working with the Gutenberg’s update (WP 5.0)

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