@johnpoz yes, I thought the Lifx update may have resolved the hardware's age.
Yes, about 10 years I attempted and it failed.
I assumed it was me messing up the network.
Tried different computer OSes and network setups and routers.
Now I'm settled and on top of a great OS, network and router, so I am confident to rely on my system and its controls.
Hence this final attempt after 10 years to prove the hardware may be at fault.
Used to have a standard TPlink or Telstra router, then moved to bridged routers, then built a DD-WRT hardware router, then a pfSense hardware router and finally settled on this pfSense VM router which is the best.
Yes, I tried some different brands, such as the speaker bulb which connects easily to the phone.
Although I have not tried connecting to the network, as it had phone and a remote control for controls.
Now that I've learned about Home Assistant to handle multiple bulbs instead of multiple apps, I may have lost the speaker bulb control details.
I'm hesitant to spend more lost money on bad items, hence the troubleshooting before taking the loss and trying my luck (bad) at a compatible smart bulb for Home Assistant.
Yes, I don't even know if the speaker bulb has Wi-Fi, but Bluetooth might be able to connect to Home Assistant. I currently use a Zigbee coordinator to receive devices, so I might need a Bluetooth coordinator too.
I checked the UniFi application/controller/server or whatever they call that thingy and Client Device Isolation is unticked.