Hi. I have an Eaton 3S 850B UPS which abruptly shuts down my PC. The UPS itself doesn't shut down, and nor does it shut down other devices connected to the mains side panel of the UPS. Only the PC is connected to the battery panel. When this happens, the PC cannot be turned on. Not until I remove the plug from the socket and put it into another socket outlet on the battery panel of the UPS can the PC be turned on. What could be the cause of this?

Apologies if this isn't the correct location to post this. But I figured, this would the likely people to use consumer UPS and would likely help me solve the issue.