Exiting insert mode with `Ctrl+c` leaves ghost text of suggestion

[maze88]

When exiting insert mode, without yet accepting the suggested text (with Tab) using different methods - sometimes an undesired outcome occurs, leaving the suggested text displayed (and not selectable[!], albiet not save-able).

Vim version: VIM - Vi IMproved 9.0

Reproduction/test instructions

Let me describe how to reproduce, and then branch into three cases that are part of my workflow...

Start (all cases) by:

1. Set mapping (for case 1): :inoremap jj <Esc> (bind jj in insert mode to return to normal mode).
2. Enter insert mode i.
3. Start typing def fizzbuzz(number):
4. Await appearance of text suggestion.
5. Proceed to one of the following case scenarios...

Case 1 - Vanilla:

1. Exit insert mode by pressing Esc.
2. Result: suggested text disappears after a second (this expected behavior). ✅

Case 2 - Mapping:

1. Exit insert mode by pressing jj.
2. Result: suggested text disappears after a second (this expected behavior). ✅

Case 3 - Ctrl+c:

1. Exit insert mode by pressing Ctrl+c.
2. Result:
   • suggested text remains displayed (unexpected behavior!). ❌
   • cannot navigate suggested text with cursor (arrow keys or hjkl). ❌
   • saving the file will not store the suggested text (this is a good thing). ✅
   • next time insert mode is entered (anywhere in the file), the suggested text will finally disappear - but until then there is an offset to line navigation, proportional to the amount of suggested lines. ✅

Conclusion

• This issue has a minor impact, however if a simple fix could be found for it - then it'd be nice.
• I am not certain of how many users "like" using Ctrl+c in Vim to exit insert mode sometimes.
• This StackOverflow thread may be a good place to start, regarding understanding differences between Esc and Ctrl+c when exiting insert mode.