Arena suddenly playing audio with 200% pitch

[Gadg3ts]

So...
I was doing a cabaret show recently, where I was looking after all the A/V media cues - music (flac) , pictures (jpg), videos (conformed dxv mov).
During the soundchecks, all worked fine - all audio clips were set to 'timeline' with pitch of '1'.
When the show had started, all the audio (whether from flac or mov files) had started playing at 2x pitch, but same duration. So I had to manually set them to a pitch of 0.5 to not sound like chipmunks.
I did during the interval when I had an opportunity to restart the app set the default clip transport to timeline to match, as it was defaulted to bpm. This made a difference for a bit, then then same issue occurred again.
Loading up the same composition today, switching between timeline and bpm does sometimes make a difference, but not always - with a pitch of 1, they're still playing pitched up.
Is this weird?... Is it a bug or just me?..
It was a bit more stressful than I needed!

(for this instance) Windows (10) laptop, Focusrite Scarlett 2i4 using the asio driver.

Thanks,
Sean

[Joris]

If you're still having this problem, could you post a screenshot of the audio tab of your preferences?