Pascal Gross' controversial injury-time penalty rescued a deserved draw for Brighton although Liverpool still went top of the Premier League.
It was Brighton's second penalty of the game after Neal Maupay fired a first-half spot-kick wide at the Amex Stadium.
The Reds thought they had taken the lead when Mohamed Salah latched onto a Roberto Firmino ball before firing home, but it was disallowed for offside by the video assistant referee.
Diogo Jota broke the deadlock, with his ninth goal since joining the Reds, as he received Salah's pass before going past two defenders and firing into the bottom corner.