Hi @ArjunSandhu ,
Could you please share a bit more about your issue?
Is there any error message within your app? If true, could you please show more details about it?
Based on the issue that you mentioned, I have made a test on my side, and don't have the issue that you mentioned.
Please check if the SP List connection is invalid in your PowerApps. Please consider go to "Data"- >"Connections" in your PowerApps portal, then find your SP List connection, then check if it has faced the "Fix connection" issue. If true, please consier click "Fix connection" to update your SP List connection.
In addition, also please consider remove all SP List connections from above Connection List, then re-create a new one, then try your app again, check if the issue is solved.
Best regards,