External links as static pages?

I’ve noticed a problem recently on my site I’m not sure if it is pretty links related or not as I also upgraded one or two other plugins at the same time.

It seems that all of the external links on my site e.g. https://xe.com have changed to point to internal static/cached pages.

e.g. https://mysite.com/wp-content/uploads/2020/04/x44535.html

Prettylinks can’t do anything like that can it?