Packet loss problem with STM32L432/I-CUBE-LRWAN V1.2.0

Hello all,
I’m working on I Cube Lrwan with STM32L432KC with SX1278 module.
Everything is working perfectly with the IN frequency band but when I’m trying to implement it on EU868 band it won’t work.
Sometimes it takings long time to join and when if joined I won’t get the data on my TTN application even not in gateway log as per fixed time interval.
I’m continuously pushing the data on 10 seconds but only gets delivered to application.
I’t seems like it follows the fix time to push the next data around 2 minutes.
Does anyone have the idea about this or any suggestion to guide me in proper way.
Thanks in advance!
Application-1 Gateway-1 Application-2 Gateway-2
logs-1 logs-2