Changing the ip address stops working after how long

[mrstorm555]

Good afternoon. I am using the app version 2.1.6. After installing the app on my "Redmi note 8 pro" (Android 10) I grant all permissions to the application. Everything works as it should, the proxy is functioning, the ip address changes both by link and in the application. But after about a day, the change of the IP stops working as in manual mode (with the button) so is the link. Reconnecting to the server does not help, restarting the application and the phone also does not restore the work of changing the user's IP address. It only helps to completely uninstall and reinstall the application. Please help me, thank you.