After Saturday's 2-2 draw with Everton, Chelsea co-owner Todd Boehly stormed out of Stamford Bridge in annoyance.
The Blues appeared to be headed for another victory after winning their previous three games across all competitions.
Early in the second half, Joao Felix gave the hosts the lead, but Abdoulaye Doucoure provided the Toffees a comeback.
The Blues appeared to have secured all three points when Kai Havertz scored a penalty with 14 minutes remaining.
Ellis Simms scored an equalizer for Everton in the 89th minute, though, after coming off the bench.
When a fan asked Boehly what he thought of the game as he was leaving the stadium, Boehly quickly said, "S* f*ing game!"
Chelsea now occupies the tenth spot, 11 points outside of the Champions League spots.