The 100G port 31/2(LAG primary) started to flap and then became "port state is Disabled" however it is in UP/UP state as shown below.
100GigabitEthernet31/2 is up, line protocol is up
STP Root Guard is disabled, STP BPDU Guard is disabled
Hardware is 100GigabitEthernet, address is 0024.3897.79a1 (bia 0024.3897.79a1)
Configured speed 100Gbit, actual 100Gbit, configured duplex fdx, actual fdx
Member of Control VLAN 4095, VLAN 900 (untagged), port is in untagged mode, port state is Disabled
STP configured to ON, Priority is level0, flow control enabled
Priority force disabled, Drop precedence level 0, Drop precedence force disabled
dhcp-snooping-trust configured to OFF
mirror disabled, monitor disabled
LACP BPDU Forwarding:Disabled
LLDP BPDU Forwarding:Disabled
The link kept on flapping for around 17 hours before it was stabilized but does not forward traffic.