@GRL Thank you for the constructive reply. I'll confirm each of these points. I do see one or two that apply so I'll look at those closely.

@Clive_A I'm using the OC200 to configure the VLANs and have already had TPL support confirm they're correct. Also, they've been working fine for nearly a year. The only change was a firmware...

****************** EDIT 5/6/25 - I was bit by the refresh bug. Resolution involved simply resetting the port back to a different VLAN for a moment and then setting back to the required VLAN. Totally...