Access VLAN on 3650 Stack

[uwlmadmin]

I've added a stack of two 3650's to my existing network as follows:

Watchguard XTM 510 managing 3 VLANs (1,25,50) with trunked connection to the 3650 stack (switchport mode trunk) on Gi1/0/1-2 and also have DHCP services enabled for each VLAN segment

ESXi server(s) with trunked connection(s) to the 3650 stack (switchport mode trunk, switchport nonegotiate, channel-group # on) on Gi1/0/3-8

Each ESXi server has three vSwitch with appropriate VLAN ID tagging and VMs work as expected (IP address assigned, traffic reaching the firewall, etc.)

However, if I assign Gi1/0/9 to VLAN 25 or VLAN 50 (switchport mode access, switchport access vlan 25/50), an end device (laptop, etc.) are unable to obtain an IP address for the appropriate VLAN segment nor does traffic seem to pass even if an IP address is manually configured for either VLAN segment.

Any idea what I'm missing in my configuration?

TIA

[uwlmadmin]

Excerpts from my config:

interface Port-channel1
 description Watchguard
 switchport mode trunk
!
interface Port-channel3
 description ESXi-01
 switchport mode trunk
!
interface GigabitEthernet1/0/1
 description Watchguard
 switchport mode trunk
 channel-group 1 mode active
!
interface GigabitEthernet1/0/2
 description Watchguard
 switchport mode trunk
 channel-group 1 mode active
!
interface GigabitEthernet1/0/3
 description ESXi-01
 switchport mode trunk
 channel-group 3 mode on
!
interface GigabitEthernet1/0/4
 description ESXi-01
 switchport mode trunk
 channel-group 3 mode on
!
interface GigabitEthernet1/0/9
 description Laptop
 switchport access vlan 25
 switchport mode access

c3650#show vlan id 25 

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
25   VDI-25                           active    Gi1/0/9, Po1, Po2, Po3, Po4, Po5, Po6, Po7

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
25   enet  100025     1500  -      -      -        -    -        0      0   

Remote SPAN VLAN
----------------
Enabled

Primary Secondary Type              Ports
------- --------- ----------------- ------------------------------------------

c3650#show int gi1/0/9 switchport
Name: Gi1/0/9
Switchport: Enabled
Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: Off
Access Mode VLAN: 25 (VDI-25)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none 
Administrative private-vlan mapping: none 
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL

Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none