I recently changed my Minecraft public username and since I haven't been able to connect to any server until re-logging in on the launcher. This happened to me on an unmodified version of 1.16.2 (Latest update). Not sure if this is a huge issue but was definitely an inconvinience for me.
MC-198445
"Failed To Authenticate Your Connection!" Server Connection Error
Resolved
Invalid
0
Thank you for your report!
However, this issue is Invalid.
This is a technical support issue, this website is to track bugs for the game and we do not have the tools to assist with technical issues here.
Please check the Technical Support Resources, or the Community Support Discord - please note that technical support for Minecraft is done by volunteers, so please be patient if you do not receive an answer right away.
Quick Links:
📓 Issue Guidelines – 🛠 Community Support – 📧 Customer Support – ✍️ Feedback and Suggestions – 📖 Game Wiki
💬 Mojira Subreddit – 💬 Mojira Discord