My TVS-h1688x has randomly rebooted 2x at around 8am since 5.2.4.3079. I thought it might be the UPS so I ordered a new UPS arriving tomorrow evening. IN the meantime I decided to run fie system check on volume 1 after reading this thread. It stalls out at 72,8% every time and I have to reboot to recover. When it stalls out CPU use drops to 0-1%. I will put in a ticket when I have time to jump through all the hoops that entails.