There is already documentaiton on this Bug. This seems to present a major security flaw in the power bi permissions service. We have been exposing sensitive datsets to the entire organization becuase of the reshare permission constantly reappearing. We are now unable to use published Apps becuase of this.
As a side note, would be great to truly lockdown and govern permissions on a workspace. Somehow all the ways to share and govern access to data and reports in the power bi service keep fighting with each other to the effect of me not understanding at all all. It's a governance mess at the moment, I truly have no idea who can access my datasets (why is there no bulk option to lock all datasets in a workspace). Tableau's permission's model set my mind at ease.