Chelsea have been charged by the Football Association after players and coaches surrounded referee Lee Mason at half-time during Wednesday night's 1-1 draw with Huddersfield.
Chelsea were angered when Mason awarded the hosts a corner but then blew for half-time before it was taken.
A statement from the FA said: "Chelsea have been charged with failing to ensure their players and/or officials conducted themselves in an orderly fashion.
"The incident occurred at half-time of yesterday's game against Huddersfield Town. Chelsea have until 6pm on Tuesday [15 May 2018] to respond to the charge."