Machine washing, especially in a top loader with agitator will destroy almost anything with a liner like a Precip. Never happened to me with a jacket, but I did ruin a really nice balaclava that way. My theory is that it just tears up the fabric as it catches on whatever else in in there, but perhaps the kind of detergent adds to the problem.

I wouldn't think of putting any kind of technical clothing in a washer, except maybe in a front loader with the garment in a mesh bag of some sort. Even that might be too much.