I find Auto-Reforge All to be somewhat unstable, particularly in combination with Optimize Gems.
If I auto-reforge, then do it again, it changes its recommendations--sometimes in a way that makes DPS go down! If I combine this with optimizing gems, each reforge recommendation has a different set of recommended gems, so I end up with four different results from the engine. The total difference in DPS is usually in the 100-200 range.
I think this started for me a month or two ago. Is it due to some new piece of gear I got? Is it a new bug?
Here's a screenshot of what the DPS graph looks like after a few rounds of this.
dps graph.png 11.9KB