If I create a dataflow that takes input from different dataflows, the refresh of that dataflow cannot be scheduled at the same time, as the refresh returns an error. I am only able to schedule on the whole or half hour, so I have to wait at least 30 minutes before my subsequent flow can be up to date.
Come to think of it, the same applies to refreshes from PowerBI. If I try to refresh my Power BI dataset from dataflows, it returns an error if that dataflow is in a refresh.