LoRa_32_V3 fails to receive "some" packets after reboot

LoRa protocol NOT LoRaWan.

I have a heltec_wifi_lora_32_V3 acting as a Gateway for several other sensor nodes.

When I reboot the Gateway / heltec_wifi_lora_32_V3:

These 2 boards carry on like nothing happened, they continue to send and the Gateway continues to receive messages.
cubecell_AB01v2 (no sensor)
cubecell_AB01 (DHT sensor)

This board must be rebooted for the Gateway to receive messages.
cubecell_AB02A_ant (Hall sensor)

Being cubecells, they pretty much are running the same code except for the sensor.

Ideas on what might be going on?

Heltec_ WiFi_ Lora_ 32_ V3, whether it sleeps, it is recommended to keep it working.

@uther

The board does not go to sleep. Occasionally I flash the board with new code and I have to go out and reset the abo2a board. But I do not need to reset the other boards.