CAPsMAN datapath settings are completely VLAN-unaware.
It should have been something like this:
/capsman datapath
add local-forwarding=yes name=DataPathVLAN101 vlan-id=101 vlan-mode=use-tag
add local-forwarding=yes name=DataPathVLAN103 vlan-id=103 vlan-mode=use-tag
(n.b. setting property bridge doesn’t make any difference with local-forwarding, it’s for CAPsMAN forwarding). If VLAN stuff is not done properly on CAPsMAN device, then nothing’s gonna work actually …
L2 settings (for VLAN) on CAP device are all off. Did you read through VLAN on ROS bible to see how it’s done properly?