Font problem

Descenders clipping on Windows environment

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I have a strange problem with one of my fonts - descenders are clipping on Win / Publisher 2013 & Wordpad at least. I can't duplicate the problem by myself on any of my programs on Mac.
I've had some clipping issues sometimes before with fonts exceeding the UPM but now the strange thing is that the font gets clipped directly under baseline?!

Any idea what's this about?