Crack in wind shield glass after fitment

IN MY CAR I HAVE RECENTLY CHANGED MY BROKEN WIND SHIELD GLASS. TO MY SURPRISE I FOUND THAT IT GOT CRACK AFTER SOME TIME WITHIN 3 HRS WITHOUT BEING HIT BY ANYTHING.
i have been told by somebody that poor quality of PVB layer shrinks with time. i had fitted newly produced glass.

DOES THE PVB LAYER SHRINKS with the passage of time?

Could anybody answer me?

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