Problem canonical redirect with Polylang

Hi I have a problem with canonicals on my site.

I’m using Permalink Manager Pro and Polylang. The problem is that it doesn’t redirect to canonical when I delete the language code. Example: if from this URL https://www.site.com/en/page/ I delete en/, the site loads the page correctly, creating a duplicate. If I deactivate Permalink, the redirect works.

Can you help me?

Thank you