Hi – I’m going to move this across to the WooCommerce Tickets forum as that’s a more suitable place for this question than Community Events – but the URL should remain the same and you should still receive updates (if you opted to receive them).
Are you using a format like h:i (in WordPress’s General Settings)? If so, you’re right – the time selector doesn’t seem to switch to 24hr format.
I’ll certainly get this logged as in need of more attention … would it be possible to either switch to H:i (uppercase H) or else bear with this a little longer?