undo after paste removes text but not images or attachments

Using a supported version?

[X] I have searched searched open and closed issues for duplicates.
[X] I am using Signal-Desktop as provided by the Signal team, not a 3rd-party package.

Overall summary

Pasting text (ctrl-v or menu) when writing a message can be undone/removed by hitting ctrl-z (or using menu). But if you paste in an image or attachment hitting undo (ctrl-z or menu) will not remove/undo it. You have to instead switch to mouse control and navigate to hit "x" on the attachment/image icon.

Expected result: ctrl-z (or undo from menu) should undo last action consistently. A paste of attachment or image should be removed by undo/ctrl-z just like text. It currently does not.

Steps to reproduce

REPRODUCTION: paste text into a message then hit ctrl-z; text removes; Paste image or file attachment (copy from Windows Explorer) into message, then hit ctrl-z (or 'undo' on menu). Image or attachment are not removed (nothing happens).

Signal version

7.8.0

Operating system

Windows 10.0.19045

signalapp / Signal-Desktop