App/Nwk FCntDown doing funny things after rejoin on console #7723

Summary

When the console is open for a LoRaWAN v1.1 device and the device rejoins the network, the FCntDown entries do funny things. I haven't covered all possible situations, but the easiest is described in the Current results section.

Steps to Reproduce

1. Get an active session for a LW v1.1 device with some network downlinks.
2. Rejoin the device with the console open.
3. Wait until the device is sent some new network downlinks.
4. Observe the App/Nwk counters

Current Result

Active session with a bunch of uplinks and only some network downlinks with MAC commands:

Then the device does a rejoin and starts sending uplinks, receiving network downlinks with MAC commands:

Notice that the downlink of this new session is marked as an App downlink in the frame counter field.

Expected Result

The network counter should be cleared and the new NFcntDown value should be set there. AFcntDown should not appear.

Relevant Logs

URL

No response

Deployment

The Things Stack Community Edition

The Things Stack Version

3.34.3

Client Name and Version

Other Information

Once again very much thank you for all the work!

Proposed Fix

No response

Contributing

• I can help by doing more research.
• I can help by implementing a fix after the proposal above is approved.
• I can help by testing the fix before it's released.

Validation

• The fix is tested in a staging environment.
• The fix is documented in The Things Stack Documentation

Code of Conduct

• I agree to follow TTN's Community Code of Conduct.