Heltec WiFi LoRa32 V2 - LoRaWan

Hi,

using the latest lib (1.0.0) I cannot connect more to LoRaWan.
Have tried even the example LoRaWanOLED.ino - (of course with my TTN settings), but I see only a “Join” - and in TTN the accepted join - but never more a “Sending”…
Not sure what happen here now.

Already have created a new device in TTN - same result.
Have tried LoRaWan 1.0.0, 1.0.1, 1.0.2 without difference.

Using RadioLib with LoRaWan 1.1.0 all is working as expected (but cannot use in this time OLED …)

Any idea how the Heltec examples can work again?
(I’m sure that it was working before with lib 0.0.7…)