Wifi drop out several times a day

[Springfield108]

Hi, 

Over the past 2 weeks my wifi has started to drop out several times a day when someone walks past the router - All lights on the router remain green showing a good connection but all devices lose wifi reception for up to 2 minutes. 

This has only recently starting and is really frustrating on Teams calls for work when my home office is only 4 meters from my router. 

Can you help? I think it may be a faulty router.