After testing, I couldn't reproduce this issue with any of the browsers. Can you share more details like your browser settings, steps to reproduce the issue, and codebase as a zip file or a git repository so I can debug and provide assistance?
This is the same site and repo as pasted above, which does not have any logic configured to enter preview mode. But the cookies are being set in both a new instance of Chrome running and a new incognito window.
The video also shows that deleting the cookies and refreshing the page results in them being set again.
The actual cookies have no value but are being set.
@tim5 I checked your video. The preview cookies you are seeing are only generated in your browser as a logged-in Primsic user. You can look at our client's site, and you will notice that you will not see any 'preview' cookies there, and your client wouldn't see any preview cookies either.
You can also check our general cookies policy here: