erro em LAG interface stack n3024

sw logando constantemente a mensagem "DOT3AD[dot3ad_core_lac]: dot3ad_lacp.c(2277) 17590085 %% Interface Gi1/0/15 partner key 12289 is not same as existing members of LAG interface Po11 (12388). Not adding interface Gi1/0/15 as active member of LAG interface Po11."

configuração

interface Gi1/0/14
channel-group 11 mode active
lacp timeout short
switchport mode general
switchport general allowed vlan add 20,30,40,50,60,70,80 tagged
exit

interface Gi1/0/15
channel-group 11 mode active
lacp timeout short
switchport mode general
switchport general allowed vlan add 20,30,40,50,60,70,80 tagged
exit

interface Gi2/0/14
channel-group 11 mode active
lacp timeout short
switchport mode general
switchport general allowed vlan add 20,30,40,50,60,70,80 tagged
exit

interface Gi2/0/15
channel-group 11 mode active
lacp timeout short
switchport mode general
switchport general allowed vlan add 20,30,40,50,60,70,80 tagged
exit

console#show running-config interface port-channel 11

switchport mode general
switchport general allowed vlan add 20,30,40,50,60,70,80,110 tagged

console#show interfaces port-channel 11

Channel Ports Ch-Type Hash Type Min-links Local Prf
------- ----------------------------- -------- --------- --------- ---------
Po11 Active: Gi1/0/14, Gi2/0/14 Dynamic 7 1 Disabled
Inactive: Gi1/0/15, Gi2/0/15

recentemente esse switch parou de responder, e voltou após 5 min, sem nenhuma ação aparente para reestabelecimento da rede.