Yes it definitely happened. One incident I remember occurred at Vimy Ridge at the commencement of the Canadian assault on the German line. Several records recall the intensity of the artillery barrage (which was one of the largest up till that time). The shells fell so thickly that allied spotter aircraft were endangered by the shells. A number of planes were hit by shells and a number of Canadians recall how the planes just disintegrated, their mass to small to trigger the shell's detonation. I don't recall how many planes were lost in such a manner but it was definitely more then one.

I'm not home so can't provide a source but I will endeavour to edit this post with sources when I get home.