Twincat 3 ADS is crashing and only server reboot can restart it

Hello to everyone,
I am a newbie of the ADS / Twincat world so I am currently not understanding what is happening.

I am developing an application written in .NET that is acquiring data from some CX that are running Twincat 2.
To do so, I developing my application using ADS library for c#.
I installed the light version of twincat, the one with only the ads communication drivers on a windows server 2016 machine.

Then I added the routes for each of the CX (about 40 machines). My application is reading 4 variables for each route with 1 second of polling rate.

Everything works fine, but from time to time I went into a strange condition.
From time to time, I am not receiving data anymore, and I find the AMS router in STOPPED condition (usually it is in CONFIG mode).
I try to restart it, but it doesn't work, and the only solution I have is to restart the server.

I looked into the Application Errors launching Event Viewer, and I found two errors from twincat when it crashes:

Source: TcySysSrv -Signal Twincat system state change for TCIO . 13
Source: TcySysSrv - Signal Twincat system state schage for TCRTIME. 13

Somebody already faced this issue?

Thank you all very much.