The usual accusations about control levelled at Saints players recently have all been about their failure to control the ball, but the FA have taken umbrage at an incident at Bramall Lane in or victory against the Blades.
Saints along with Sheffield United have been charged with failing to control their players after tempers flared late on in the Saints' 2-0 win at Bramall Lane on Saturday.
The incident came in the three minutes of injury time added at the end of the game when United's John Fleck fouled Che Adams, the ex-Sheffield United player who was on the scoresheet in Saints win.
Fleck was shown a yellow card for the challenge, checked by VAR, but Saints players surrounded referee Paul Tierney demanding more, with United's Oli McBurnie and Southampton's Jannik Vestergaard booked for their reactions.
For those watching on TV it was no more than handbags at dawn, plenty of pushing and posturing but little else, but it seems the FA want to look into it further.
An FA statement said:
"It is alleged that both clubs failed to ensure their players conducted themselves in an orderly fashion during the 90th minute and they have until Monday (15/3/21) to respond."