Suspicious Activity

So, last night my norton antivirus showed an suspicious activity on my wifo network and my android mobile s9 also showed an suspicious activity on my wifi and all devices got disconnected from wifi. But my xfinity advance security showed nothing about an suspicious activity. Every other device that was connected to the wifi showed nothing about suspicious activity, just my laptops norton security and my s9 showed an activity. Is it just an false alram or something wrong with my wifi? I tried contacting xfinity agent to talk about this issue but that automated bot didn't connect the call to an agent. What should I do now, is it just a false alarm or is there really an suspicious activity going on?