QFX5120 no longer recognizes the QSA adapter upon upgrading to 23.4R2-S4

When QSA adapter of 4x10gb is inserted to the switch port, the chassis will no longer recognize it under show chassis hardware.

In previous version for i.e: 23.4R2-S3 and below, when QSA is inserted + channel-speed configuration , the transceiver is showing as UNKOWN, however the interface works fine and its forwarding traffic.

{master:0}
root@QFX> show chassis hardware 
Hardware inventory:
Item       Version Part number Serial number   Description
Chassis                AL41048084    QFX5120-32C
Pseudo CB 0   
Routing Engine 0     BUILTIN   BUILTIN      RE-QFX5120-32C
FPC 0      REV 05  650-092914  AL41048084    QFX5120-32C
 CPU           BUILTIN   BUILTIN      FPC CPU
 PIC 0          BUILTIN   BUILTIN      32X40G/32X100G-QSFP
  Xcvr 21        NON-JNPR            UNKNOWN
  Xcvr 24        NON-JNPR            UNKNOWN
  Xcvr 26        NON-JNPR            UNKNOWN
  Xcvr 27        NON-JNPR            UNKNOWN

The issue is related to this chassis configuration:

{master:0}
root@QFX> show configuration chassis 
fpc 0 {
  pic 0 {
    port-range 21 25 {
      channel-speed 10g;
    }
    port-range 26 29 {
      channel-speed 10g;
    }
  }
}

Workaround:  If the switch is using QSA with channel-speed configuration, channel-speed configuration needs to be removed then reboot the chassis , this will ensure the chassis will recognize the transceiver.

Solution:  On 23.4R2-S4 recognizes QSA Adapters which is why the channelization config is not required. It is channelized automatically.

As such removing the channelization configuration and rebooting the chassis is recommend ensuring the chassis recognizes the transceiver + QSA adapter.

Note: QFX5120 platform does not support QSA adapters.

https://apps.juniper.net/hct/model/?component=MAM1Q00A-QSA&tab=sPlatforms

https://apps.juniper.net/hct/model/?component=MAM1Q00A-QSA28&tab=sPlatforms