I tried it in the same place as described above, typing `c` ctrl+space gives `count` first, yay, and other more likely things near the top.
But it introduces a problem when continuing typing with the autocomplete list open, when adding `o` instead of leaving the `count` entry highlighted the highlight is moved to the `code` entry further down the list, then adding `u` closes the autocomplete list. Ctrl+space brings it back much reduced as expected. It would seem that with continued typing the selection is purely alphabetic (selecting `code` over `count`) and/or it doesn't include the current entry. Is this selection done by us or Scintilla? If its Scintilla maybe we need https://www.scintilla.org/ScintillaDoc.html#SCI_AUTOCSETORDER set to custom?