I’m so happy to read this. Because I thought I was going insane. Maybe we both are, but at least i’m not alone 
My legacy triggers (actions) have always been working just fine, but they don’t respond anymore. The automations just don’t get triggered at all when pushing the buttons in the widgets (legacy).
I was running the testflight version of the companion app and have installed the stable, but same result.
With the new widgets I’m experience exactly the same with you. I can create them within the companion app, I can select them within the widget section, but they never show. The tasklist for example, just works fine
I’m pulling my hair, because already tried deinstalling the app, resetting the frontend cache, but nothing seems to help.
So not really much of a help to you, but maybe we have some simularities which breaks stuff. My Internal address is the local ip with 8123 for port, and remote through Cloud. Funny enough they do work through my Apple Watch.
Running 2026.4.0 HA, 2026.2.1 companion app.
I already searched Github a bit, but cannot find anything simular.