Brocade portdporttestでISLの距離が表示されなくなる

FabOS 9.1.1bから9.2.1aに更新したあと、portdporttestコマンドを実行するとISLの距離が表示されなくなります。

Switch:admin> portdporttest --show 41
D-Port Information:
===================
Port: 41
Remote WWNN: 00:00:00:00:00:00:xx:xx
Remote port index: 41
Mode: Automatic
No. of test frames: 1 Million
Test frame size: 1024 Bytes
Pattern: jCRPAT
FEC (enabled/option/active): No/No/Yes
CR (enabled/option/active): Yes/No/No
Start time: Wed Dec 4 12:44:57 2024
End time: Wed Dec 4 12:45:42 2024
Status: FAILED
================================================================================
Test Start time Result EST(HH:MM:SS) Comments
================================================================================
Link traffic test 12:45:27 FAILED -------- ----------
================================================================================
Roundtrip link latency: unknown

...........................missing
Egress power: Tx: -0.3 dBm, Rx: 1.5 dBm, Diff: 0.0 dB (No Loss)
Ingress power: Rx: 0.3 dBm, Tx: -0.2 dBm, Diff: 0.0 dB (No Loss)

Failure report:
Local port error(s): LINK_RESET_IN, LINK_RESET_OUT