Why 'can view' member can actually edit the file?

I have a project in draft and I shared the link configured as ‘can view’.

However, after the person has accessed the project, he can edit it freely.?

Why is this happening?

Can you show the Share window?

Screenshot 2021-05-24 at 00.28.34

You can see the exclamation mark, what does it say when you hover it? Try to change the file sharing setting from anyone can view to only people invited to this file and then back to see if the problem goes away. If not, share the file link with Figma support team via the bug report form.

Where exactly is that setting, please?

Below the input field in your screenshot.