Problem with SC API triggering incorrect response step - and therefore failing

I’m puzzled by a SC action not working. It was created following a tutorial by @Teodor some time ago. I’ve used it on several sites without any problem. Today, I tried it on a new site and it didn’t work. What I’m particularly puzzled about is that if I remove one of my response steps, it works fine. So the issue is probably more general - why is the ‘else’ branch running at all, given the condtion is met?

Below are the relevant steps, with the response step indicated. This version, with the step disabled works fine; if I enable it, the action fails. The response in the developer tools is the description I entered in the response step (so not very useful for debuggin).

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