Lora reciver dont work after restart , version"v1.8.1"

Lora receiver does not receive packets. only then it starts working when you press config and LORA and save. restart does not help
heltech lora v2 board
ttgo lora32 v2 board

is it possible that the LoRa driver does NOT go into RX mode after boot
and only Save does:
re-init → LoRa.receive() → works