Client trait stops working

Hi, how are you, I have the client server installed on a linux, and the client on an Android, and it works perfectly. But after a few minutes my client stops transmitting, although I look at the applications that are running on my android and it is working. So I do not know why it is without activity.
If I enter the application and deactivate and activate the service there again if it starts to work again, but after a few minutes the same thing happens.

Are you sure you disabled battery any optimization for the app?

Perfect is the andrid that was restricting me to save battery

Thank you