It's considered careless enunciation in my neighborhood, Pastel, although the central /t/ or /d/ is characterized as a 'stop-t/d', that is, it is not allowed to explode like the aspirated /t/ or /d/ which ends sentences. (I'm not sure that voiced consonants can be considered aspirated, but here the /d/ seems to perform similarly to the /t/ ). There is also a good range of individual variation.
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