unable to reboot

I am using mikrotik ver. 5.22 on vmware vsphere exsi. I wanted to update it to ver. 5.24 but as i reboot the system with /system reboot from gui as well as terminal, it says rebooting but doesn’t reboot. I don’t want to reboot from vsphere due to risk in crashing. could anyone please let me know about the problem?

Thanks,
Kijush

I’ve never had trouble with reboot but I think the crash risk is very low.