Server stop receiving data for devices

Hello Team ,
Firstly thanks for Traccar.
I am using traccar form last one year. Now i have facing a issue with server.
Issue : Server stop receiving data from devices and this issue is randomly. When server stop receiving data from devices then logger have not any type of error and not show any connection of devices and server.
Randomly mean

1. device reporting continuous without any exception suddenly server stop receiving data and not show any error as well as i have checked with network provider and they provide me logger that show data packet sent successfully to server and get ack from server. After restarting the server data come continuous.
2. Some time no need to restart server. just wait 2-3 hours after data receiving automatically. In this i have missed multiple packet of data.

Is the process running?

Yes Process running.
I have mapped 300+ devices with server. this issue come with random device and random time.
protocol is "aquila".

Yesterday i have notice new case in this issue -:
Firstly the server stopped receiving data from 3-4 devices after some time , the number of devices was increasing like 40-50 devices. After 3-4 hours the server stopped receiving data from 250+ devices.

My guess is that your service is running out of some resources.

Any solution of this problem ?

Well, you have to figure out the root cause first before we can talk about solutions.