I'm using an iPhone 4s. My phone is still on iOS 8xx and works fine. My wife's is on the latest (9.0.1) and has the same problem. Resetting the phone takes away the grey blob, but lifting it to her ear activates the "raise to speak" feature that creates the 0:00 bubble again. No option found in "messages" to remove the voice text feature, no way to disable the lift to speak feature (that I've found). We do not use iMessage, SMS only. Tried turning off Siri, no luck. Next step is to roll back, but that's a pain. Fortunately I think our latest backup on her phone was still in the 8xx iOS.