E220-900T22D receiver module restarts itself after 1000 bytes of transmission

Hello Renzo, First, thank you for the library that you have published for E220. That helped us a lot. We're coding a project that requires sending audio data from one Arduino that is connected to a LoRa module to other. We're using E220-900T22D modules along with your E220 library. Problem that we're currently facing is, when we try to send packets with a size of 100 bytes continously, receiving module restarts itself after it received 10 packets. That causes loss of sended data because restart takes 3-4 seconds and it means a lot for continuous audio stream. I think it's about buffer problem but i don't know how to fix. Maybe module fails to free itself? We need to continously send audio data between modules so this restart problem seems to cause problems during development. I've attached fixed sender and fixed receiver files. This project is our undergrad end project so any help will be appreciated. Thank you in advance.