Charlton are now ten games without a win after conceding a 96th-minute equaliser against Hull to draw 2-2 at The Valley on Friday.
Charlton broke the deadlock in a scrappy first half as Darren Pratley rose highest from a corner to head the opener.
And while Championship Player of the Month Jarrod Bowen grabbed an equaliser just two minutes into the second half, Mouhamadou-Naby Sarr tapped in three minutes later to give Charlton back the lead.
But six minutes into stoppage-time Hull broke Charlton hearts as substitute Keane Lewis-Potter's header rebounded off the post before hitting Charlton 'keeper Dillion Phillips and heading into the net, sending the away fans wild and leaving the hosts with heads in hands.