I.e. this is less of a "spores on gowns surviving disinfection" case, and more of a "you bleached this surface, you thought it's enough, but your gown touched it too early and the fabric 'rescued' the spores" one, am I right?
Also relevant for things that travel between rooms and are disinfected in between, like ultrasound machines.
Other studies have reported that spores can survive washing processes in use.