I am not a sheet metal expert but I have had problems using "bend deduction" at times, in your model if you change the bend allowance to to "K-Factor" all seems to be good. Maybe its just the radius specified in the bend deduction.
I'm not sure what happened, but if you delete, then recreate, the sheet metal feature, it works fine.
The extra bend was probably causing the issue as it doesn't appear to actually be in the part. Too bad you can't simply delete it.
Thanks for looking at that,
But, I did redraw the sketch and it still failed. Even if I draw this shape in a new drawing, it fails. The bad bend always seems to be the first obtuse angle drawn.
Maybe i need to make the geomettry more complicated to get it to work.
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