What would cause compelling rewrite of absolute URLs on our staging site to point to this staging site, even if they were manually written to target our live site?
We manually write pages in HTML and CSS on a SiteGround hosted staging site, save our changes, and then test them. We can either write them in the native WordPress editor or in our editor for the theme (TagDiv Composer), and our problem occurs in both cases.
We write a link target as an absolute URL in a page, as in the following example:
"Click here for ours
Daily specialties! "
We then save our work in the editor.
The site has thousands of absolute URLs that are affected.
What we tried
We have to miss something, so do not hesitate to offer guidance or perspective, regardless of whether it seems superfluous or not.
We tried to check the server, theme and child theme files .htaccess and functions.php in cPanel for code that could cause this (we may have overlooked or misunderstood it?). We also checked that the site URL, etc. in the Settings> General section of the WordPress Dashboard points to the live site without the staging prefix.