Munster suffered a blow when Warwick was caught in the face by a stray leg and with no Ronan O'Gara on the bench had to turn to Conan Doyle, an elementary replacement at fly-half.
But he will be pushing for a starting place against Leeds on Saturday after helping turn the Welsh side's fortunes around after coming off the bench against Middlesbrough and Coventry.
The unexpected turn-of-events occurred early in the day when Muhammad asked to speak to the judge in a bench conference, unable to be heard by the jury.