Jurgen Klopp took aim at VAR after a narrow onside call saw Leicester equalise and sparked Liverpool's collapse at the King Power.
The Reds had the lead heading into the final 15 minutes courtesy of Mohamed Salah's opener, but three quick-fire goals saw Leicester turn the game on its head.
James Maddison pulled one back from a powerful free kick which hung low, before Jamie Vardy capitalised on a coming together between Alisson and Ozan Kabak to give the Foxes the lead.
Harvey Barnes punished Liverpool's lacklustre defending to add a third in the closing stages, but it was Maddison's goal which irked Klopp.
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