When I use the settings and unlink the account. Then I use my new account. But it still saying I have to sign in my previous account. It kept on and on but I can't sign in new one and unlink old one. Can somebody help me with this issue.
Related issues
Comments

Thank you for your report!
We're tracking this issue in MCPE-96635, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki