With further testing it seems consistent. How i did it: Enter merryweather submarine and die Call Pavel to cancel heist while still on surface Finish prep

When you finish the intel mission the prep will already be done

In a previous run I died three times on the Kosatka prep and called Pavel to cancel the heist. This did not end the prep so i finished it. Next run I go to start the prep and it was already done. I have not tried to replicate this. If consistent, should this be allowed?

Edit: I do not think this glitch should be allowed in runs as it is a preparation done outside of the run, sort of similar to how the GTA 5 mobile app was banned in story mode runs because players could start the game with maximum upgrades to their cars by upgrading them outside of the run.