We have one PowerBI dataset that takes data from Google BigQuery. As of a few weeks ago we started getting timeout errors during scheduled refresh. Some days it runs through (about 20min), other days it gives a timeout error. No regularity between errors and no errors also in Google side.
Usually the manual refresh goes through, but a few days ago when I wanted to refresh the dataset in Desktop it was stuck in load mode and never load the data. When I tried to create a new report with just one table that is ~18k rows in BQ, it showed ~99k rows during refresh and was stuck at load.