[Question/bug?] Issue receiving packets

[epwaudby]

(For the record this might not be a bug, much more likely I've configured the gateway wrong but it's hard to tell)
Also, couldn't find a way to change the label to 'Question'

Class A Node

Environment:
Node

• RFM95W
• LOLIN(WEMOS) D1 mini (clone)

Gateway

• Multitech Multiconnect Conduit (MTCDT-H5-210L Firmware 1.4.17)
• Node Red (in Loopback mode)

Pin Configuration

• .CS = D8,
• .RST = D4,
• .DIO0 = D0,
• .DIO1 = D1,
• .DIO2 = D2,
• .DIO5 = D3, // Not connected

Credentials
const char *devEui = "00800000A0000648";
const char *appEui = "0000000000000000";
const char *appKey = "00000000000000000000000000000000";

Symptoms

1. Join works correctly and I see the (correct) transmitted packets ("Hello World") on the Node Red debug trace
2. The data sent to the gateway should just be echoed back
3. I see that a packet is received (can be seen in the attached trace.txt file) from the gateway but, when it's decrypted, it bears no relationship to the "Hello World" expected

The send and receive appears to be good. I'm wondering if there isn't a problem with the construction of the keys for receipt.

Any ideas?

Trace File (with DEBUG Enabled)
trace.txt

[epwaudby]

Solved - Code is working perfectly (well done guys!)

As I suspected, it's the gateway configuration. On the Multitech Conduit, it's imperative to set the Local Network Settings to 'Enabled' and to duplicate the keys or the reverse channel doesn't work

See below: