So, this happened at a FFG kit tournament and I wanted the community's take on it.
My opponent had a range 2 untokened A wing attack on an untokened Firespray. One dice accidentally came out of his hand while shaking and he acknowledged this but then he intentionally rolled the other die in his hand which was a focus. The discussion now was whether he rerolls both or whether he just rerolls the accidentally thrown die. Of course, ideally he should have picked up the accidentally thrown die right away and rerolled them both together but we are in middle ground now. I insisted that the intentionally rolled die remain.
He would have to be lucky and I unlucky for this to have any real impact but you know how dice goes. We are X wing friends and it did not become a big deal however after the tournament we are both having beers with 2 other members of the community who both did not agree with the call. I was very confident with my call at the time but am now wondering what others would have done.
Note: the TO is not very fluent with X wing rules so our decision together would mostly likely be better however my opponent might have let me have my way because I am about 2 years more experienced.