A while back, @metzman was kind enough to do some fuzzing of the skia graphics library with FTZ enabled. Sadly, it didn't find anything super exciting (just some null derefs, timeouts, and floating point div0s), but you can now see some of them here:
https://bugs.chromium.org/p/oss-fuzz/issues/list?q=label:Proj-skia-ftz