LACP bond "Link Failure Count" is not working and the bond does not failover as expected when using multiple aggregators

Issue

• When viewing bond state via procfs /proc/net/bonding/ , the Link Failure Count for an LACP bond slave is always zero even when we know the link has been down.

  [root@r75 ~]# cat /proc/net/bonding/bond0 
  Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
  
  Bonding Mode: IEEE 802.3ad Dynamic link aggregation
  Transmit Hash Policy: layer2 (0)
  MII Status: up
  MII Polling Interval (ms): 100
  Up Delay (ms): 0
  Down Delay (ms): 0
  
  802.3ad info
  LACP rate: fast
  Min links: 0
  Aggregator selection policy (ad_select): stable
  System priority: 65535
  System MAC address: 52:54:00:b5:ba:8b
  Active Aggregator Info:
      Aggregator ID: 2
      Number of ports: 1
      Actor Key: 9
      Partner Key: 1
      Partner Mac Address: 6e:50:47:d6:00:46
  
  Slave Interface: ens10
  MII Status: up
  Speed: 1000 Mbps
  Duplex: full
  Link Failure Count: 0
  Permanent HW addr: 52:54:00:b5:ba:8b
  Slave queue ID: 0
  Aggregator ID: 2
  Actor Churn State: none
  Partner Churn State: none
  Actor Churned Count: 0
  Partner Churned Count: 0
  details actor lacp pdu:
      system priority: 65535
      system mac address: 52:54:00:b5:ba:8b
      port key: 9
      port priority: 255
      port number: 1
      port state: 63
  details partner lacp pdu:
      system priority: 65534
      system mac address: 6e:50:47:d6:00:46
      oper key: 1
      port priority: 65535
      port number: 1
      port state: 63
  
  Slave Interface: ens11
  MII Status: down
  Speed: Unknown
  Duplex: Unknown
  Link Failure Count: 0
  Permanent HW addr: 52:54:00:50:d2:0f
  Slave queue ID: 0
  Aggregator ID: 1
  Actor Churn State: churned
  Partner Churn State: churned
  Actor Churned Count: 1
  Partner Churned Count: 1
  details actor lacp pdu:
      system priority: 65535
      system mac address: 52:54:00:b5:ba:8b
      port key: 0
      port priority: 255
      port number: 2
      port state: 71
  details partner lacp pdu:
      system priority: 65535
      system mac address: 00:00:00:00:00:00
      oper key: 1
      port priority: 255
      port number: 1
      port state: 1
  

• Additionally, an LACP bond with multiple aggregators will not failover as expected to the backup aggregator when the current aggregator's bandwidth drops due to a link down event.