not a bass player, but the first thing I pick up in a song is bass, and Id say youve got the easy job, but tjm
Might be helpful to transition to a setup where you can hit a mute button for your channel going to the house, while you figure it out in your headphones. Then after you learned hit unmute to go live again. Might be a little weird, but will get you through in a pinch..
Also be sure you can hear. I find that my playing and ability to pick up is related to how clearly I can hear myself in relation to the other parts of the mix. If something is too loud, I tend to play safe, using patterns that I know should work, but when the sound is right and you can hear clearly, your ideas should flow better