Pages preview in second language doesn't work

Hi 🙂
Using the latest version,
for my posts in english (french being the default language), preview doesn’t seem to work, I have a 404, here is the URL that is generated (the page is an english page, my second language):
http://www.fitforlife.fr/?page_id=4772&preview=true

Because I have a plugin that redirects all 404, this url brings me back to the homepage.

https://ww.wp.xz.cn/plugins/polylang/