Daily panics on kern.proc sysctl calls

My TrueNAS CORE system is crashing every 1 to 2 days. I already ruled out my harddrives, which all pass long S.M.A.R.T. tests. I am going to perform a MEMTEST later on this week to also rule out my memory.
Going trough the Debug files I cannot find a clear indicator what is causing the crashes. All crashes come up with the error "Fatal trap 12: page fault while in kernel mode". Maybe someone can help me find if this is a bug in the TrueNAS beta or something is wrong with my hardware.