Can you confirm this is an extract refresh happening directly on Tableau Online? Selecting the "Change Schedule" option and changing the schedule should not cause an immediate refresh. The "Run Now" option would do this but changing your schedule should not. Can you confirm this is what is happening to your refresh?
I'm using Tableau Bridge to refresh the extract but changing the schedule on Tableau Online.
I have tried to reproduce here locally but have been unable to trigger a run now refresh by changing the schedule of a Tableau Bridge extract. Can you create a support case and we will examine this in more detail?
Ok will do thanks