I tried just about every combination of settings I could think of with Starlink on WAN1 and my fixed wireless ISP on WAN2, and never found any combination that was truly satisfying. Then I figured out that Starlink just drops - no signal at all - many times each day. It normally only lasts for a few seconds, but my Balance 30 LTE would often read it as “no cable detected”, or at other times as a signal loss. Often, Starlink would be back before the failover completed. It made calls on Teams or Zoom or via VOIP maddening, but the drops were almost always so short that it didn’t matter for video streaming (Netflix, etc.) or file transfers (e.g., Box). I don’t do online gaming so have no experience to offer there.
So… I tried SpeedFusion Cloud, effectively bonding Starlink and the fixed wireless ISP together (both set to Always On/Priority 1". Solved the problem. Now, those short drops just don’t matter because the connection doesn’t break. SpeedFusion Cloud (SFC) keeps it going, and the call doesn’t get interrupted. I have it set up on my “work” computer and my wife’s, for Teams and Zoom. After about four weeks, we’ve used less than 100GB of data, so this might be costing me about $2/week. The rest of our devices don’t go through SFC, as it’s not needed for them.
Just a thought to try. Sure worked for me.