It is very misleading that if a question in a dashboard has a data issue (truncated rows, in my case), that issue is not communicated at all at the dashboard level.
This issue happened recently when someone had set a large time range on a dashboard filter, and the question just showed 2 of the 12 actual series, without any warning.
If it is not possible to guarantee an intuitive truncation of rows, I think it would be more correct to not render a question at all if there are too many rows.