Fix the buggy Code editor (memo with syntax highligh).
Memo editor is extremely buggy and can corrupt text. Try to select some text and press Ctrl+C. And hold Ctrl+C. At first selected text will start to flicker, and at some point it might even disappear.
If you'll try Ctrl+Z you'll only make it worse.
Autocomplete may work. Or may not.
hints may be shown. Or may not. Even on Ctrl+Shift+Space.
There's really much things to improve.