Application Data Limits

I have set up my sample Lora Network. I have dragino gateway and sx1276 node on arduino uno. I achieved to receive data on TTN. My quesiton is, After a while of receiving message I could not see new messages on TTN application data. Gateway status is always fresh, I mean 1min or 2min status, but application status is not similar after a time. I will be glad to hear from you your opinion about this problem.
Many thanks in advance. @arjanvanb