It's been fixed.
Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.
~Ralph Waldo Emerson
"I was just the one with the most unsolicited sombrero." - Traegus
Well, the drop rate fix was in the patch notes for Wednesday's patch, and there have been other threads noting the same experience as yours, so yeah, I'd say it's fixed. 
I haven't done any true testing so perhaps I'm not the best to comment on this, but it seems like the recipe drops are back to normal. I did back-to-back missions last night and my recipes went from 1 to full - it seems like it's been awhile since that happened. Anyone else notice the difference or am I experiencing one of those anomalies.