XR500 LAN Connectivity Issues

So In October 2019 I had recently purchased a new XR500. I did the set up as per normal and everything seemed to work normally, However it seems I have had some connectivity issues connecting to my Synology Server and Locally connected computers via wifi from any device over LAN but no issues connecting remotely over WAN, even from home. The Synology is hard wired into the router so I thought wifi was the issue, so when I hard wired my laptop instead of using wifi, still the same issue. A list of the things I did are below to help fix the issues which I sent in a message to Netduma_Alex  in October last year.

These are things that I have/had done when my connectivity issues started after changing routers. 

1. I power cycled all my electronics connected to the network. TV/Mobiles/Laptops/Gaming Consoles/PC/NAS.

All electronics seem to have resolved the connectivity issues after the power cycle apart from the TV/LAPTOPS talking to the NAS. Internet connectivity has not been an issue.

2. I reset the TV to factory settings, and reinstalled apps to connect to the NAS. They connected for a bit then stopped talking to the NAS after a while. 

3. I then reset the NAS network connectivity and connected via PC (Wired - which is not an issue). Uninstalled and reinstalled any apps that use network resources on the NAS. Reset all router configurations and added the XR500 to the NAS Settings so it can sort its uPnP ports. 

4. Opened ports on the XR500 for any apps that require ports to be open and then powercycled every thing again including the router.

My NAS/Media server is now accessible via my PC (wired), the TV can now talk to the NAS/Server (barely,wifi) but the laptops (macs) still have issues logging on to the NAS/Server Apps (via wifi - tried logging on with Chrome & Safari). Everything else seems to be working ok so far with all the other devices. UPnP has been turned on on the XR500.

Other Information.. I am aslo unable to connect to my PC via smb in finder on my macs (this was not an issue prior to the XR500). The units show up in the sidebar in finder but can not connect, asking me to check the server/ip address which is correct. The smart connect is disabled as I didnt want to add any more confusion to connectivity after reading some of the other threads.

My router connects to the net via a Fibre ONT and is run with VLAN enabled by VLAN tag group.

Alex did reply and asked me about Guest Networks (not Running), Multiple Subnets on the network (none), Wireless extenders (none).

Since my reply I have heard nothing in almost a year, (I sent a message in March - no reply).While logging in via a remote IP is a work around the fact that I can't connect to my local networked computers via local IP is just a joke and shouldn't happen with such a pricey router. If anyone has any information they would like to share to halp me come to a solution for this issue or perhaps I should return this hardware for something that will actually work like its supposed to. Downgraded firmware also doesn't help.

Cheers

Jack