I've tried this with 3 different wallets, and I can confirm that I am able to successfully use the connect strings with other clients like Amethyst, Prime, and even Nostrudel. The problem only manifests with YakiHonne.
I raised this issue about a month ago, and the person I was taking to (a girl whose name I can't recall) said they were aware, that the Alby NWC was the only one that worked for now aside from the integrated YakiHonne NWC, and that they'd be addressing the problem soon.