Lightroom export images issue

Please show us an example of one of these photos. We need to see a screen capture of the photo before export, after export and we need to see the Export dialog box settings as well. Use the "Insert Photos" icon to include your screen captures in your reply. Do NOT attach files.

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut out as that is just so much dead space to us non-Techs and it takes up vast amounts of scroll space making the reply less readable and less likely that others will bother with your post.