Matrix TX3xi + GEM Retro speed problem

Howdy all… first time poster.
I was looking forward to trying out my old treadmill on Zwift when I found out it had a CSAFE port. I acquired the necessary GEM Retro unit and to my delight found that Zwift on my Android tablet recognized it.

The problems happened when I actually started a run. The treadmill is starts at 2kph but Zwift is reading it as 20kph!

In fact, it doesn’t seem to recognize the decimal place on the speed and as a result multiplies the treadmill setting by 10!

Is there some kind of fix I can implement or is this a bug on the Android client?

Thx