What does l reuteri taste like after 9 hours?

I made some very nice l reuteri yogurt Recently. lately I noticed that the yogurt doesn’t seem as tart as before. I use l reuteri with a bit of regular yogurt, and it tastes like regular yogurt instead of that nice bitter tang. I also haven’t noticed the oxytocin effects like I was before. I am suspecting that the new batch of l reuteri pills might be dead. I used half as much yogurt this time with the l reuteri (10 billion cfu in capsules). After 9 hours it has set, but doesn’t taste like anything at all. could that be normal for l reuteri? I can’t remember how long it took to taste the tanginess. I also may be overthinking this. Temperature is fine for l reuter, nothing changed.