Enercept meter junk voltage values 6.74328388145112E-32 via EGX - anybody seen this?

[TonyGray]

I occasionally see stretches of strange 'signal' values coming from Enercept meters for the three phase average  line to line voltage.  It will do this for a couple of hours, then go back to real readings.  I'm not familiar with either the meter or the gateway, but I'm wondering if this is a common occurrence that everybody else knows about.

Timestamp="2015-06-23T15:30:00" OriginalValue="472.34375"
Timestamp="2015-06-23T15:45:00" OriginalValue="473.9375"
Timestamp="2015-06-23T16:00:00" OriginalValue="472.15625"
Timestamp="2015-06-23T16:15:00" OriginalValue="479.375"
Timestamp="2015-06-23T16:30:00" OriginalValue="479.21875"
Timestamp="2015-06-23T16:45:00" OriginalValue="472.375"
Timestamp="2015-06-23T17:00:00" OriginalValue="472.71875"
Timestamp="2015-06-23T17:15:00" OriginalValue="473"
Timestamp="2015-06-23T17:30:00" OriginalValue="472.28125"
Timestamp="2015-06-23T17:45:00" OriginalValue="479.40625"
Timestamp="2015-06-23T18:00:00" OriginalValue="479.0625"
Timestamp="2015-06-23T19:15:00" OriginalValue="6.74328388145112E-32"
Timestamp="2015-06-23T19:30:00" OriginalValue="6.74328388145112E-32"
Timestamp="2015-06-23T19:45:00" OriginalValue="6.74328388145112E-32"
Timestamp="2015-06-23T20:00:00" OriginalValue="6.74328388145112E-32"
Timestamp="2015-06-23T20:15:00" OriginalValue="6.74328388145112E-32"
Timestamp="2015-06-23T20:30:00" OriginalValue="6.74328388145112E-32"
Timestamp="2015-06-23T21:45:00" OriginalValue="6.74328388145112E-32"
Timestamp="2015-06-23T22:00:00" OriginalValue="6.74328388145112E-32"