Possibly memory management bug, or they have identical hardware. Can't be just coincidence.
I seriously do not understand how Valgrind works, does this mean the issue will just be ignored?
That's the catch, it randomly crashes. I have no idea what triggers it. I could give you root access on my VPS if you can install Valgrind for me.
I have installed Valgrind but the command you gave doesn't run DreamDaemon.