Focus frames get saved instead of 'Light' frames - by: dokeeffe

Here's a strange one. I'm running a sequence right now with 1 queue entry for 20xLight frames.
I have ticked the 'Focus if HFR > x' box so its focusing between frames.
Now I'm starting to notice some of the Light files being saved are not the actual Light images but the focus frames.
Its really strange.... I'm watching it now and of course when I watch it, its fine. If I leave it and go make a cup of tea and come back,,, then I have these small focus frame files saved instead. Very strange.

I've attached some screenshots to prove what I'm seeing but I have no idea how to reproduce it. One thing I did do was add/remove/add/remove/add the sequence queue entry at the start as I kept selecting the wrong options and only noticing after starting the sequence. (filter,prefix,temp etc etc) so maybe it got in some sort of weird state by doing this..

Anyone else seen this