The Stratux is great for what it is, but this is pretty common. I always talk to folks with issues w/ Stratux, but never, ever get support requests from folks with the AstroLink or S3.
I'd tell you the Astrolink is the best bang for your buck: <a> https://www.iflygps.com/STORE/Product/astro-link-ahrs-gps-ads-b-receiver </a>
it does everything the S3 does, but is less expensive and has a smaller footprint. It's what I use.