I have a problem. I am testing the connection of two ESP32 Lora Heltec devices to a Dragino LPS8 gateway using LoRaWAN. After performing the ESP32_LoraWAN Master library update I was finally able to properly work the connection of a device to the TTN network through the gateway using OTAA (using Arduino example of OTAA). The joining process must be tried 2 or 3 times but finally it is possible to join and it starts sending packages without problem. The drawback occurs when I try to link a second device, while the first one is operating, the joining process takes too long, between 5 and 12 attempts, and sometimes it appears to me that the device is joined (in serial messages of Arduino IDE), but in TTN I keep receiving only messages from the first device, I must retry the connection several times to finally get messages from both devices in TTN. Is this normal? Is it due to normal LoRaWAN operation? Is there a problem with the ESP32 devices or the gateway?. Thanks.