Hi again,
Thanks for getting back to us and sharing the details of your workflow.
We have not received any other reports about an incident with the job post editor in WordPress admin similar to yours.
I can help by testing and then reporting this issue to our developers if you like.
Before I do that, let us make sure that there are no other plugins or themes installed on your site which may be causing the issue.
Try disabling all of your plugins except WP Job Manager (and add-ons). Then try testing again to see if the issue persists. If that resolves your issue, you can find what was causing it by enabling each plugin one by one while continuing to test.
If that doesn’t help, you can also try switching to the Twenty Twenty theme via Appearance > Themes, and test again. If the issue is resolved then you know it’s a problem with the theme, and you’ll need to contact the theme author for further assistance.
Let us know how it goes.