Is it just me, or does the recording sound like it has "douăsprezececea" rather than "douăsprezecea"?
Yes! The ce sound is glitched. I hear it twice too.
It's still glitched, it's obviously not a priority to the duolingo team at present.
This has happened on several other lessons that contain the number twelve.
No issues with the audio on 18/06/2020