[Note to admin - the "model" selection under 'new thread' won't accept TL-SG608E so I've selected TL-SG108E instead. Database needs updating] TL;DR: Switch picks management VLAN completely at random I

Hi, I have 3x XE75 Pro units, all connected to the wired Ethernet network that I have throughout my home. The master unit plugs into my main switch, a TP-link TL-SG1024DE, which in turn connects via a