Testing the "Mode on" reccomendation now. Config on both devices is:
2911 Router Configuration:
interface Port-channel1
description LAN LACP
ip address 192.168.16.1 255.255.255.0
hold-queue 150 in
!
interface GigabitEthernet0/1
description LAN LACP
no ip address
duplex full
speed 1000
channel-group 1
!
interface GigabitEthernet0/2
description LAN LACP
no ip address
duplex full
speed 1000
channel-group 1
3650-X Switch Configuration:
interface Port-channel1
description LAN LACP
switchport mode access
!
!
interface GigabitEthernet0/47
description LAN LACP
switchport mode access
speed 1000
duplex full
spanning-tree portfast
channel-group 1 mode on
!
interface GigabitEthernet0/48
description LAN LACP
switchport mode access
speed 1000
spanning-tree portfast
channel-group 1 mode on
