View Format has been Modified by Someone

After I deleted several attachments from a message in my Sent folder, “View Format has been Modified by Someone” was displayed in my status bar.

The document was no longer in my Sent folder. Instead, it appeared once again in my Drafts folder.

I have LN 8.5.1 FP1 Standard All Clients installed.

Subject: Did you click Save as Draft button to save the message after deleted attachments?

I tried Ctrl+S, the message is saved and still in Sent folder.

But if click Save as Draft button, the message is saved but go to Drafts folder.

I didn’t not see the message “View Format has been Modified by Someone” in my status bar.