How would you handle?

[Andy]

I've had occasions where I wasn't sure exactly what my partner was calling or ruling on and approached him/her to get clairification. I can't ever recall a situation like the one in the OP where my partner totally kicked a ruling that needed to be corrected. There have been judgement calls that I didn't agree with, but judgement is judgement and there is no way I am attempting to change my partner's judgement call.

I see no issue with initiating a conference with your partner when you are not sure what the call is or what ruling is being applied.