When starting MaxSea Time Zero 1.8.1 when one ore more MFDs are already running, the MFDs will lose sensor input (GPS, N2K, etc.). This has been confirmed on both the MFD/8 and MFD/12. After 2-11 minutes the MFD will frequently recover, but not in all cases.
MaxSea has reported that they are aware of the problem and working on a solution.