Hi @kbdiverservices
Thank you for the report!
This is an issue with Regenerate Thumbnails plugin, already reported here and here. The problem seems to happens only with big images that are downscaled by WordPress when the height or width is above the threshold of 2560.
As a workaround, you can install this extension as a plugin to hooks into Regenerate Thumbnails to use the edited image.
If for any reason you want to restore the original big image, you can add this code snippet to your child theme functions.php file or use the Code Snippets plugin:
add_filter('_wa_restore_original_image', '__return_true');
I hope this helps.
Let me know if you have any other questions.
Best,
Nabil