Datasets on scheduled refresh fail and give the following error on the schedule refresh page:
Before the data import for XXXXXXX finished, its data source timed out. Double-check whether that data source can process import queries, and if it can, try again.
There is no error on the refresh history, it just shows failed. It is a different table name every day. Refresh Now works for these datasets when I try them an hour or two later.
I believe this started after I updated to the Februrary on-prem gateway.