PC reboots during ritual encounter.

It happens inconsistently but I haven't seen it happen elsewhere.
Sometimes there is just one reboot in a a few hours.
But sometimes there can be severral in a row, which is extremely annoying.

It often happens around a second after clicking on an altar (during altar's sound effect after clicking it) and before monsters spawned, when there's barely any strain on system resources.

I did some digging and found there were threads before with pc reboots, though not specifically during ritual encounter.
https://www.reddit.com/r/pathofexile/comments/121wqw9/update_path_causing_pc_to_randomly_restart/

Since it's a hard reboot there are (probably?) no logs to attach.
But let me know if I can do something else to help tracing this issue.

What are your system specs?

What's the manufacturer & model of the PSU you have?

Specs: Xeon e5-2689, 32GB RAM, gtx 1060, Win 10 pro.

PSU is Nitrox SL-550.

PSU is amongst the suspects for causing this but it may as well be motherboard, RAM or bug in the game since this situation seems to occur in specific scenario.