It should be a known issue. Part of the fix has been started to deploy into the product environment and will be finished in Early September.
Power BI users may see delay in refresh times or refreshes failing if the refresh operations involves XML processing. Users may see below error: Microsoft.AnalysisServices.OperationException: Failed to save modifications to the server. Error returned: 'Resource Governing: This operation was canceled because there wasn’t enough memory to finish running it. Either increase the memory of the Premium capacity where this dataset is hosted or reduce the memory footprint of your dataset by doing things like limiting the amount of imported data. More details: consumed memory MB, memory limit MB, database size before command execution MB