My HKLS hasn't been working since my Indigo server (2025.1) updated to macOS 26.4 and my HomeKit hubs (AppleTV, HomePod Minis) all upgraded to 26.4 as well.
Prior to that, I had been using the betas and also wrote the thread on the workaround for tvOS 26.4 betas to switch to using 26.3 HomePod minis in case there was some kind of regression bug that cause tvOS 26.4 beta to break HKLS.
I found through troubleshooting that mDNS had stopped advertising HomeKitLink Bridge. When I restart the HKLS plugin, the advertisement comes back. But when I go to the Home app, something causes mDNS to issue a Rmv and the advertisement goes away.
I wrote GlennNZ directly and he said that everything on his end is working with OS 26.4 and 26.5 beta, so I thought maybe I have a corrupted HKLS bridge somehow. So I've already done the following:
1) remove the existing Bridge from the Home
2) Reset Accessory/Bridge on the Plugin
3) try to re-add the Accessory using the new QR code generated
-- when I try to add the Accessory, at some point in that process after I click "Add to Home", there is an Rmv that kills the advertisement on mDNS (is that because the plugin died?)
After doing that a couple of times, I decided to:
4) add a new Bridge
5) transfer the accessories from the old Bridge to the new Bridge
6) delete the old Bridge
7) restart everything and see the new Bridge advertised
... again, when I add the Bridge Accessory to Home, there is an Rmv that kills the advertisement
9) I unchecked the "publish device" checkbox on one simple light switch and saved on the old bridge, but that didn't cause it to be visible/addable to the new bridge, so I'm unsure on how to achieve my plan in #8
10) I got stuck here with anything new to try....
Here's the screenshot of the mDNS advertisement showing up and then the Rmv being issued. I'm not sure what is causing it, but it is consistently happening now with everything I've tried above. The plugin re/starts and the mDNS advertisement shows up, and then when I go to Home to add the Bridge Accessory via the QR code, during the adding process the Rmv causes the advertisement to go away and I have to restart the plugin for it to show up again. Note, the "Add to Home" never successfully completes.
Here's the screenshot of that: