Issues joining TTN gateway on one of my (x2) WiFi Lora 32 v2 boards

Hello, I’m having an unusual issue right now.
I have two Heltec WiFi Lora v2 boards that can communicate through Lora “directly,” but when I use the TTN gateway, only one of them successfully establishes a connection. The other one continues “joining” and would eventually fail.

(I attempted to switch the antenna.)
Thanks.