OTAA: I receive frames in the GW but not in my application

Hi! In resume I stopped receiving data to my application node. My application was sending data evey hour. Yesterday my ChirpStack server went down. After I solved the problem, my GW reconnected automatically but I stopped receiving data in my application. I checked in my GW details and I received all the frames I was supposed to receive, but I haven´t received any data to my application.

Is there a way I can recconect my application?

Could it be that your Redis database was reset when your server went down? In that case you need to force your devices to re-join.