VR Still Unplayable in Fleet Battles

AMD Ryzen 7 3800X processor and GTX 1660 Super on an Oculus Quest 2.  The game runs perfectly smooth on everything but fleet battles.  No issues in the single player campaign when fleets are present.  No problems in dogfights.  In fleet battles, there are moments when it's playing normally, then FPS drops to sub-10 FPS.  Then for no apparent reason, it will suddenly go back to normal.  Sometimes tabbing out of the game on the desktop or taking off the headset and putting it back on will resolve the problem, but that isn't reliable.  There are issues in both AI and multiplayer fleet battles, but the FPS issues seem considerably worse in the latter.

I'm launching the game from within the Oculus headset or within the Oculus desktop app library.  I am not using Steam to launch the game as I've read that can be problematic.  Help?