Copy code block adds "⧉ Copied!" to note body

I believe that this is caused by the Code-Clipboard plugin. Something similar has previously been reported.

Are you sure you are using the Markdown Editor / Viewer and not the Rich-Text Editor as a viewer because I believe the issue only occurred with the Rich-Text Editor.

There is one issue on the developers GitHub page for this plugin and it refers to users encountering a similar problem.

Sadly the developers last comment (March 2024) is

Sorry to hear that it is not working for you. I currently don't maintain this repo. You are welcome to create a pull request if you find a solution, however there is no guarantee that it will be merged.

So it looks like the plugin will not be updated or fixed.

EDIT: The Copy Code Blocks plugin seems to do something similar and was last updated JAN25. I have not tried it and the example animation only shows it being used in the Markdown Editor.