I´m still unclear about the problem.
However a clutch slip can happen on any helicopter type although extremely unlikely. I´ts important to shutdown or idle the affected engine immediately to avoid sudden reengagement.
On the 212/412 it´is always possible to enter autorotation and land as is in any helicopter with failed sprague clutch or decrease power demand so the other engine will keep up (which the 212 will do easily
)
Alouette, where you riding along in the sim?