Ring Doorbell 3 - App failing to connect to Live Feed but can answer door bell with minimal problems

Hi All, We installed a ring doorbell 3 last week and all worked well at first but now when me or my wife tries to connect to the live feed sometimes it works but a lot of the time it says Failed to Connect "were having trouble connecting to your front door".I've done the connection test on the ring app and its well above the speed needed, i've also tested our wifi in the house and my phone states 67mbs download and 25mbs upload so more than enough.The router is situated in the porch about 45cm from the doorbell so shouldnt be a problem there, i am sat about 2 metres from both and still it says failed to connect.Any Ideas?Thanks in advance