Are you referring to the new fault-tolerant behavior in Intel MPI Library 4.0? The FT support is limited and does not cover collectives. Feel free to check out the Reference Manual for details on provided functionality.
Intel MPI Library works according to MPI standard: completion of MPI_Bcast on the root only says that it complete sending, completion on non-root guarantee that we got all data (without loses). There are no additional confirmations to root.Regards!