No worries...
Lets see, on you app after you have entered your pin code to unlock it,
Click on "your avatar image"(a left side menu should appear)->then "Settings"->(then check what's configured at the "Server" combo-box)
The RPC node should be set to the one I have told above. But you can use anyone's else. Although because it depends on the history of the node (aka being late or not) the app will react to the information received from that node.
Hope it helps.