S5148F-ON OS10 VLTi LACP Default VLAN issue

We installed two S5148F-ONs running OS 10.4.3E.132.  Each host has a dual port 25G card, that is cabled to the same port number on each of the switches with LACP. We didn't have the right length cables for 10 hosts, so these are currently cabled to only one of the switches until the cables arrive.

When using the default vlan, the singly cabled hosts can ping all the others on the same switch pair, but they can't ping hosts on other switches.  When using a tagged vlan, the singly cabled hosts can ping the hosts on the other switches. I changed one host, and the switches, to use tagging for the default vlan (vlan 50), and it can now ping the hosts on other switches on vlan 50. 

The singly connected hosts ended up on the secondary switch.

ntr-X11# show vlt 8
Domain ID                  : 8
Unit ID                    : 2
Role                       : secondary
Version                    : 2.3
Local System MAC address   : d8:9e:f3:c2:ce:00
Role priority              : 32768
VLT MAC address            : 0a:00:0a:00:0a:04
IP address                 : fda5:74c8:b79e:1::2
Delay-Restore timer        : 90 seconds
Peer-Routing               : Disabled
Peer-Routing-Timeout timer : 0 seconds
VLTi Link Status
    port-channel1000       : up
	
VLT Peer Unit ID    System MAC Address    Status    IP Address             Version
----------------------------------------------------------------------------------
  1                 d8:9e:f3:c5:f7:00      up       fda5:74c8:b79e:1::1     2.3    

There are no inconsistencies in the MAC tables (from show vlt mac-inconsistency)

The ports are configured like the following, eth1/1/1 using port channel 51, eth1/1/2 using port channel 52, etc

Both switches have the same config

!
interface ethernet1/1/1
 description nc
 no shutdown
 channel-group 51 mode active
 no switchport
 mtu 9216
 flowcontrol receive off
!
...
!
interface port-channel51
 no shutdown
 switchport mode trunk
 switchport access vlan 50
 switchport trunk allowed vlan 30,40,100-150
 mtu 9216
 vlt-port-channel 51
!
...
vlt-domain 8
 backup destination 172.31.80.10
 discovery-interface ethernet1/1/51-1/1/52
 vlt-mac 0a:00:0a:00:0a:04
...
! Link to upstream switches
interface port-channel9
 no shutdown
 switchport mode trunk
 switchport trunk allowed vlan 2-3,10-11,20,30-33,40,50,60,100-150
 mtu 9216
 vlt-port-channel 9
!

The host, where pings work for vlan 50, I changed to tag vlan 50 and sets the default vlan to 1 (which is otherwise unused on the switch). i.e.

interface port-channel51
 no shutdown
 switchport mode trunk
 switchport access vlan 1
 switchport trunk allowed vlan 30,40,50,100-150
 mtu 9216
 vlt-port-channel 51
!

So tagged vlans are work with LACP, and untagged (or possibly mixing tagged with untagged on LACP links) does not work with LACP on OS 10.4.3E.132.

Should we be able to mix tagged an untagged vlans on LACP? It works on our OS9 switches.

Or have I configured these port channels incorrectly?