Mine didn't either. A damn week or so ago I had no tam in there. Forgot I had the incubator on. Just rockin away.
My grain looked fine when it had spawned but had the slightest flowery sent, that I came to kno w as cat mold. Whatever they call it. That fuzzy hairy black stuff.
Just a guess,
Maybe the mycilium out passsed it in the jars but as soon as you added a new place to grow the mold set up shop.
But if your other ones didn't go and they are from the same l.c....then maybe not.