First follow-up e-mail in inbound scenario inconsistent with debugger logs

[krevelen]

I'm trying to modify my "welcome" follow-up question for remotely triggered e-mail dialogues, and although the callback URL used to POST the inbound e-mail to is correct, the response e-mail content seems to remain unchanged since my first attempt, even though my dashboard's "debugger" panel shows the intended new welcome follow-up question.
If the original outbound response question e-mail was cached somewhere, how do I switch off caching? I've tried with a modified dialogue URL in my dashboard's "dialogs", creating a new dialogue configuration there, or replying/triggering with "/reset" in the e-mail body, but to no avail.