I applied and received a warm response with a coding challenge, however I never heard back from them after I replied with my solution. I tried to follow up multiple times. No feedback, even a simple "sorry/no" is poor experience.
If you email I'm happy to review, we do mean to reply to any candidates we engage with, my apologies if that didn't happen. Note: this position doesn't require a coding challenge.
Edit: This was a few months ago.