[c-nsp] Etherchannel Issue

[M K]

I have Cisco CISCO7606-S (R7000) with 48  SFM-capable 48 port 10/100/1000mb RJ45 moduleNow , I have 5 ports connected to my WiMAX ASN gateway via two vlans one to the access side and the other one connected to the core sideThe issue am facing now is some of the ports are into errdisable state by itself
Module diagnostics output   3  Pass
Group  Port-channel  Protocol    Ports------+-------------+-----------+-----------------------------------------------10     Po10(SU)         -        Gi3/3(D)    Gi3/11(D)   Gi3/19(D)                                    Gi3/27(P)   Gi3/35(P)   20     Po20(SU)         -        Gi3/4(D)    Gi3/12(D)   Gi3/20(D)                                    Gi3/28(P)   Gi3/36(P)  
CR2.KJ-Building#sh int Gi3/3 | inc lineGigabitEthernet3/3 is down, line protocol is down (err-disabled)
interface GigabitEthernet3/3 description ASN LBPA0 C6 P5 (Po10) (CORE_VLAN) switchport switchport access vlan 10 switchport mode access no logging event link-status load-interval 30 speed 1000 duplex full flowcontrol receive on flowcontrol send on channel-group 10 mode on
CR2.KJ-Building#sh run int vlan 10Building configuration...
Current configuration : 242 bytes!interface Vlan10 description CORE VLAN ip address 10.40.2.3 255.255.255.240 no ip redirects no ip unreachables load-interval 30 standby 10 ip 10.40.2.1 standby 10 priority 120 standby 10 preempt standby 10 name CORE_VLAN_HSRP
The configuration for the physical port is identical for all ports , no log messages give a clue that there is a problemNow , if i enabled those interfaces again , I lose the device until I restart the module again
No spanning-tree issues were noticed , I have checked everything !
What could cause this?
Thanks