How to prevent the Android system from automatically stopping services？

[socialFlyer]

I have set up the rustdesk service and successfully connected.
However, when the Android controlled end is unattended, the [permission] will automatically stop the service after a period of time and need to be manually restarted.
Has anyone encountered the same problem as me?
Is this an issue with the Android system or where does Rustdesk need to be set up?

[socialFlyer]

Probably an issue with the Android system, I am currently trying to resolve it