Why would a web site not appear in a regular Chrome browser tab but does appear in an incognito Chrome browser tab?

A site I like has changed its server, and when it did, I got the server’s home page when clicking on the original site’s link. By mistake, I clicked the link when I had an incognito window open one day, and lo and behold, the site popped up as plain as day.

I contacted both the site owners and the new server company to inform them. Neither had any explanation.

Why this discrepancy in where the site shows up?

I checked and the site does show up when I use Internet Explorer.

I’m using simple Google Chrome. I do not use any ad blocker. I haven’t fiddled with the web browser or my computer in any way. I use Kaspersky anti-virus software, if that matters.