This seems to happen in a large number of ATC (not pilot) voices since the update in question. The phrases are all the same, and are all new to this update (I never heard them before v3.10.2 was installed, and they are still there in the more recent update of course). Phrases such as 'when ready' and 'calm'...
Dave, at least give us the option to revert to the pre-3.10.2 soundset. Or is there a way I can go back to the version of PF3 prior to 3.10.2 (whatever that was)? I can't imagine why these new phrases and words were added as they sound so different from the rest of the sentence, not even human half the time. Often I have no idea what the word or phrase even was unless I look at the COM window. Usually Oncourse updates are welcome and a case of 'onward and upward' but this is a very marked backward step. Sorry!
Yes, unchecking the 'Simulate COMs' stops it, but I don't like that unchecked as there is then no difference is voice quality between the supposedly 'live' pilot and ATC coming across a radio (no matter how hi-fi it is, it won't sound the same!).
Can start listing the voicesets that are affected if you like, but since the change came to many of them starting with 3.10.2, I imagine you will know what was changed.