Thumbnail URL stripping out domain name

Have recently migrated a site from DEV to Production. All is generally working well except for media uploading issue. I can upload media to correct folder, but WP seems to be stripping out the site domain when inserting it into a post.

So for the following post example, the link to the image file works, but the image itself is broken because it’s looking for https://imagefilename (not https://www.bowenfc.com/media/imagefilename). I’ve double-checked the Misc setting for this, so stumped at the moment.

<a href="https://www.bowenfc.com?getfile=257"><img class="alignleft size-thumbnail wp-image-257" title="fig_2b" <strong>src="https://fig_2b-150x150.jpg"</strong> alt="fig_2b" width="150" height="150" /></a>

Settings:
Wordpress (& Blog) address: https://www.bowenfc.com
Misc > Upload folder: media
Misc > Full path to files: https://www.bowenfc.com/media
(not using month- year- based folders)

Any help, greatly appreciated!