EByte LoRa e32: high sending and receiving latency

Hi :) I'm a newbie in this Lora and esp thing could you help me out? I just tried your latest library and successfully exchange information between LoRa and ESP32. However, it needs quite some time until the message is received, when starting the program it could take a few minutes until the first message can be received and then goes normal. could you help me out? I need instant received as soon as the Lora send message