Page content being stripped out when adding from posts/pages

I have just used the plugin to add alt text to images inside posts / pages where missing.

When reviewing the posts it had often times (but not always) removed all of the content except for the image.

This was using the classic editor on a genesis theme.

It seemed to remove all content apart for the image, when the image was the first part of the content.

Running WordPress 5.7

Using Genesis 3.3.3.