On almost all featured servers, chat never works. Only messages displayed by the server is shown, I can see my own chat, but it's extremely likely that there's chat I can't see, and people can't see my chat. Only Lifeboat people can see my chat and I can see theirs.
This has been going on for an extremely long time.
I can see chat on most custom servers.
Thank you for your report!
However, this issue is Invalid.
Unfortunately we don't accept issues related to External Servers here on the bug tracker, but please add more details if you think this also affects multiplayer over Realms, LAN, or XBL.
I'd suggest contacting the server owner directly or seeking help on the Minecraft forums.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki