Mobile Public Links don´t work

Hello,

I have the link shared in public (everyone who has the link. No need to be logged in).

See : https://www.screencast.com/t/6nZ1ElU3A

When I open the link on PC, it works.

When I open it on mobile, I am asked to create a box account, even though the link is shared publicly.

See : https://www.screencast.com/t/8hLvimImOk

How to fix this?
Thank you for your help.

Ludovic