Data from the Master Page Permium widget entered on one site is showing up on another

[ckbraman]

I just had a very strange experience.

Within a question that I typed on a forum, I typed a URL to a website of mine: http://chuckbraman.com/quintet.html

After I published the question, instead of the URL displaying as a plain URL, the URL displayed as a graphic, including a logo, of an entirely different website of mine, one that uses your Master Page Premium widget: https://www.newyorkjazzbands.com.

See: https://forum.webflow.com/t/trying-to-create-a-sticky-element/59918

(Despite the logo and slogan for newyorkjazzbands.com displaying, if you click on the words "New York Jazz Bands," it takes you to chuckbraman.com, not newyorkjazzbands.com.)

So it seems that the URL of one site of mine that does not use the Master Page Premium widget, chuckbraman.com, is drawing data from a different website that does use that widget, newyorkjazzbands.com.

Do you have any idea what is happening here?

(1) Why are this logo and graphic replacing the plain URL that I type?

(2) Why is the WRONG logo and graphic (for a website different than the URL) showing up?

And how I can correct this behavior?

(I don't want the logo and branding for one of my sites to show up when I or someone else on a third-party website types a URL for a different one of my sites.)

Thanks for your help.