Deployment Pipelines - Dataset is different after a "Successful" Promotion from DEV to TEST

Hello , 
For now I am just working with a single dataset that feed a report. So, it is just happening to  the dataset, what has then an effect in the report. 
It was more than one time and to fix it I had to delete the content of the workspace and deploy again. 
The changes that I made that lead to this were changes in the model in PowerQuery. One time was the adding of a new table and the other time was the change on a step in a query. 
How I manage the process : I made the changes in the PowerBi desktop and then I publish to the dev workspace, overwriting the existing content. Automatically the comparison in the deployment pipeline detects that there are differences in both objects : report and dataset. I select both and deploy to test environment. Then no differences are detected between the report, but the dataset still detects differences. When I said that I download the .pbix is not from the deployment is from the test workspace view. 

I am not saying that it happens everytime I did changes in the model, but at least in these times it happen. 

Thanks a lot.