Greetings. Currently, using a multi-line text field with append comments, the one making the updated value saves the form and it places the person who created the list as the person who created the comment. In the attachment, it shows that Swapna was the one that created the comment even though William did. you can see the creator at the bottom. v1.0.17.0
Thank you for reporting this issue – I have confirmed the bug and will fix in in the next release.
When you upgrade to the new version the name will show correct – it is in the version history, but the code renders the author of the list item as author of the comment and not the actual editor.