No Wavefrom displayed until Simulation is Completed

I've recently updated to V 2021.1. It used to be that after the simulator had completed about 20% of the run, it would start displaying a grid and as much of the waveform as it had completed so far but after this update there is no waveform or even waveform grid displayed until the simulation has fully completed. That is highly inconvient because a complete run takes about 30 minutes so Is there a setting that can restore it to the original display-as-you-go mode?

Thanks

Robert Phillips