Hi. Have you checked out this thread TTN Console not working properly all the time [console] [gateway] [not connected] [no traffic] [application] [no data]
Whilst you gw May show not connected can you still see traffic coming in from your nodes to your Applications?
If yes but in area where you know there may be coverage from other nodes check in the message metadata to see if your troublesome gw(s) are amongst the ones passing on the message. If they are not there then it may be (and likely is) the case that they are not connected and you have more troubleshooting to do or need Krishna’s help…