I've been using a Kickr SNAP for over a year now, mostly on Zwift. Early on, I saw that problem but haven't seen it for a long time. Two things seemed to be the cause:

1. Wahoo had a bug, and a software update fixed it. I would think the Customer Support asked you about firmware version but check that you are on the latest version of firmware.

2. Too many things on Bluetooth. I have the SNAP, a cadence sensor and a heart rate monitor routinely connected to an old Mac Powerbook which runs Zwift. If I added a Bluetooth headset, I invariably ran into problems - would see dropouts of cadence or heart rate or power.

A variant on (2) that may be an issue: to use that BT headset, I had to turn on Bluetooth on my cell phone, in addition to BT being active on the Mac Powerbook I use to run Zwift. I noticed once that the HRM had attached to the cellphone, which may have meant it wasn't paired to the Macbook for a while.

Going to a wired headset (and turning of BT on my phone) when I want to do audio solved the problem.

This was also the case for a friend of mine who bought a SNAP over the holidays - he is a cell phone junkie, basically walks around all day like a dork with a BT earpiece and his phone on his hip. Taking that off, turning off BT cured his SNAP blips.