Unused Prompt reappears after switching chat - even after deletion or new prompts

Wanted to check something in a new Thread.
Did not use prepared Prompt.
switched to existing thread, unused prompt followed → OK, I want that!

Using new Messages does not clear unused prompt.
If I have to repeatedly remove / delete the followed prompt to collapse the input field and see what the answer is, it gets on my nerves … (bug)

→ remove followed prompt when deleted, entirely new message is used, or give a “delete draft” button. (feature)