FCC uses Monaco as the code editor, which has IntelliSense (autocompletion) enabled by default. You may be able to find a way to disable IntelliSense in the documentation.
Workaround: click Esc to get rid of the autocomplete drop-down, then click Enter.
Okay. Does this happen for everyone or is it just me? When I did some FCC several months ago I don’t remember this happening. Not fun to have to press ESC for every word lol.
Stumbled upon this by accident, don’t know if you solved it already, but you can disable the “accept on enter” behavior so it accepts on tab alone instead of enter. Setting is called “editor.acceptSuggestionOnEnter” just set to off. There’s also a “smart” setting but I haven’t found it to work well at all.