Aeon Labs Aeotec ZW056 Z-Wave Gen5 Doorbell stutters during playback

I have 2 of the doorbells which I've loaded with various MP3's that I use for announcements. I'm finding that on both units when I trigger playback via zwave action->set configuration-> parm 6, value 16, size 1 at random times the player will develop a stammer so instead of saying:
"The front door opened"
I get:
"The front the front the front door opened."

Needless to say I'm REALLY failing on the WAF rating at the moment.

I've added it to homeseer securely and here's the node info:

I also set param 2, value 1, size 1 to have only one repetition.

I'm running HS3 Pro Edition 3.0.0.300 (Linux) with the 3.0.1.95 z-wave plugin.

Has anyone else seen this and worked around it