For that uplink an online decoder shows it has its ADR bit set.
For the downlink it shows you’re seeing two LinkADRReq MAC commands in FOpts: 0340020071 and 033500FF01. This is unrelated to the topic at hand, but indeed related to ADR: see LMIC Library Always Does Unwanted Downlink.
I’d expect you can disable those LinkADRReq MAC commands by using LMIC_setAdrMode(0).
All said, the Dragino-LG02 is not a compliant LoRaWAN gateway, so you’re into many surprises, and you might even harm other network users in your neighbourhood by connecting that to a LoRaWAN network. You wrote you’re on some private network, maybe they allow/support that. But please don’t use that on TTN, not even for debugging.