I did the same, I planted some late stuff for kicks. well one of them succumbed to the SVB. I hadn't been checking those because the moths had passe.d... but I had a plant there prior which I broke by accident. I bet some eggs fell off and they bored in.
the other one that died, well, when I went to get the borer out, I dug in wrong and the stem broke too.
Sheila, gardening on the zone 4b/5a line.