The Whites striker appeared to a chorus of boos and departed on 83 minutes to cheers after scoring and providing an assist to Ryan Sessegnon for 3-1 and game over as far the result went.
But in the last 24 hours, Martin has signed a new deal with parent club Derby that keeps him at Pride Park until 2020.
In effect, Fulham's loan striker has made it plain where his long term future lies - while he remains with Whites for the rest of his campaign.
Derby may have done the smart thing by adding a nought or two to his price tag, and Slavisa Jokanovic insists the option to buy the Scotland international is still part of the enforced loan arrangement.
"What they've done is completely legal, but although he signed a new contract it doesn't bring us any change," the Fulham boss added.
"We're going to send him back in better condition. This situation doesn't change anything, and if they (Derby) are in the top six by the second week of May - he will play for them.
"I don't know what's going to happen in the end, but we still have an option to buy."