Kobuki, I've extended this out to 15k and get the same (consistent) result. Below is a quick snap shot of the output with extra debugging:
Looks suspiciously consistent to me. Does this spur any other ideas?
Initialise Station
Setup Complete
Packet passed CRC
1 Missed Packet/s: Below ReSync Threshold of 50
Packet passed CRC
Found Packet: decoding
{"raw":"50-03-FF-FF-71-00-21-EE-FF-FF","station":0,"packets":[1,1,50.00],"channel":2,"rssi":-70,"batt":"ok","windv":4,"windd":93,"rainsecs":-1,"fei":-30,"delta":2565040}
1 Missed Packet/s: Below ReSync Threshold of 50
Packet passed CRC
Found Packet: decoding
{"raw":"80-03-00-2C-B9-00-6D-C0-FF-FF","station":0,"packets":[2,2,50.00],"channel":4,"rssi":-69,"batt":"ok","windv":4,"windd":0,"temp":21.9,"fei":-31,"delta":2566044}
1 Missed Packet/s: Below ReSync Threshold of 50
Packet passed CRC
Found Packet: decoding
{"raw":"50-03-FE-FF-71-00-57-5A-FF-FF","station":0,"packets":[3,3,50.00],"channel":6,"rssi":-71,"batt":"ok","windv":4,"windd":92,"rainsecs":-1,"fei":-31,"delta":2566044}
1 Missed Packet/s: Below ReSync Threshold of 50
Packet passed CRC
Found Packet: decoding
{"raw":"80-02-FF-2C-B9-00-8C-32-FF-FF","station":0,"packets":[4,4,50.00],"channel":8,"rssi":-76,"batt":"ok","windv":3,"windd":93,"temp":21.9,"fei":-30,"delta":2565036}
1 Missed Packet/s: Below ReSync Threshold of 50
Packet passed CRC
Found Packet: decoding
{"raw":"50-03-00-FF-71-00-6A-4D-FF-FF","station":0,"packets":[5,5,50.00],"channel":10,"rssi":-70,"batt":"ok","windv":4,"windd":0,"rainsecs":-1,"fei":-30,"delta":2566032}
1 Missed Packet/s: Below ReSync Threshold of 50
Packet passed CRC
Found Packet: decoding
{"raw":"80-02-00-2C-B9-00-C7-91-FF-FF","station":0,"packets":[6,6,50.00],"channel":12,"rssi":-70,"batt":"ok","windv":3,"windd":0,"temp":21.9,"fei":-31,"delta":2565036}
1 Missed Packet/s: Below ReSync Threshold of 50
Packet passed CRC
Found Packet: decoding
{"raw":"50-02-00-FF-71-00-C0-1C-FF-FF","station":0,"packets":[7,7,50.00],"channel":14,"rssi":-74,"batt":"ok","windv":3,"windd":0,"rainsecs":-1,"fei":-30,"delta":2566048}
1 Missed Packet/s: Below ReSync Threshold of 50
Packet passed CRC
Found Packet: decoding
{"raw":"80-01-00-2C-B9-00-29-43-FF-FF","station":0,"packets":[8,8,50.00],"channel":16,"rssi":-70,"batt":"ok","windv":1,"windd":0,"temp":21.9,"fei":-30,"delta":2566052}
1 Missed Packet/s: Below ReSync Threshold of 50
Packet passed CRC
Found Packet: decoding
{"raw":"50-01-00-FF-71-00-2E-CE-FF-FF","station":0,"packets":[9,9,50.00],"channel":18,"rssi":-79,"batt":"ok","windv":1,"windd":0,"rainsecs":-1,"fei":-30,"delta":2565016}