Some engines have two in one sensor but I've only ever seen one reading in my scanners.

I would nevertheless monitor coolant temp real-time. Use a graph of possible to watch for abrubt changes that can't happen in reality.

The other thought that comes to mind is something to do with turbo pressure control.

Monitor the boost pressure during the hesitation. There was a problem that I helped with recently with a problem in the turbo pressure feedback. Sadly I can't remember exactly what that issue was but I found a web page that covered the symptom and it was a specific part in the turbo control that ended up being the cause.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)