Sounds like a power blip. I use something like this https://www.amazon.com/APC-Battery-Protector-BackUPS-BX1500M/dp/B06VY6FXMM/ref=asc_df_B06VY6FXMM On the whole home network. That way your wifi and computers/server doesn't shut down with a minor surge/outage. I run the ethernet through it as well. Everything is plugged into it. If your home has wonky outlet it can fluctuate like ryan was saying.