Slow connection when connected to satellite

What is your housing materials made of? 

There should be a minimum of 30ft between router and satellite for them to function properly

Try enabling/disabling these settings to see if they help: beamforming, mu-mimo

If you haven't done so since the firmware was updated, try factory resetting and starting over. It shouldn't need to be done but it wouldn't be the first time a firmware update caused issues and a reset/reinstall fixed things.