AbhishekGrandhi Hi mate, I’d suggest starting by clearing data/cache from the Nothing OS launcher (settings > apps > Nothing launcher > data/cache > clear).
If you continue to face issues, do a backup/reset of your device. And, after that I’d suggest logging a support ticket with the Nothing https://nothing.tech/pages/contact-support who are best placed to assist. Be descriptive in your ticket and outline any troubleshooting you’ve followed 🙂