When I first bought the Get Lucky upgrade I got a Frenzy and before it ran out I got a Lucky! Cookie which did 15 minutes of production x7 for a total of 105 minutes of production as intended. After this first instance though, subsequent Lucky!-ies were not registering with the Frenzy status and only gave me 15 minutes of prod of whatever my bank was at.
Essentially, the effects are not working together as they should be. It seems to have worked with different GC buffs (Such as the special building one) But I haven't gotten another instance to confirm whether or not it works consistently with them. Edit: It works with different cookie combos, it just doesn't work with Lucky!
Just a footnote, Frenzy DOES work on my CPS, and Lucky! Does work as intended, it's just not working together simultaneously. I had refreshed the game and restarted my computer, neither of these solved the issue.