Product link PROBLEM: WooCommerce changes “https://” in “https://”://

Hello,

I have some files in a shared server with a links like this:

https://11.22.333.444/download/01/file.rar

I use this server as simple storage.
When I copy this link inside the link of Product

View post on imgur.com

and I click “update”, WooCommerce changes the link to:

https://11.22.333.444/download/01/file.rar

I don’t want this. Because I have no ssl certificate on that server.
Do you have some idea?

Thank you

Francesco
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