Anton L.Z. wrote What's the firmware version of your AP now? Is it 20170823? Yes, that's the version. Are you still having problems with it?

FWIW the last firmware I got did resolve the problem I had, I've not had problems with a simple multi SSID to multi-VLAN setup. Not impressed that it took so long, and I haven't looked at any other...

lzs wrote I've also updated TP-Link support with my new findings, and hopefully they will resolve the problem. Did TPLink resolve this problem in the last 2 months?

I've also lodged a support ticket on this, and had no response yet. Unbelievable that they don't respond to problems on a very expensive router failing to work for a very simple and well-advertised...