I just posted this over in the Motorola Owner's Forums under a discussion regarding the same issue:
Matt arranged a conference call today with some Moto engineers, me and another Moto X user. We did a lot of testing and the engineer that conducted the call was able to reproduce the clipping/cutting out problem just as described by me and users in this discussion. So that's good news because they are clearly aware of the problem and working on the issue. I was encouraged by the call and fully expect that a fix will be coming. Obviously they could not give an ETA as to when a fix will arrive because there are a lot of factors including testing the fix before it's release. However, I do believe they are treating this as a priority.