[6.9.2] Target host not reachable at some point.

There's nothing logged about the crash, this usually points to a hardware issue, start by checking that power supply idle control is correctly set, having 3 DIMMs while supported is not ideal, you can also try just two to see if it makes any difference.

 

P.S. General support forum would be a better place for this.

19 hours ago, JorgeB said:

having 3 DIMMs while supported is not ideal, you can also try just two to see if it makes any difference.

I will try it with 4 DIMMs.