Factorio Forums

What I did (several times):
• research mining effectivity from "2-3" up to "7"
• save
• load
• now it shows "2-3"

Are you using any mods? If so, please upload them here.

Thanks for the report,

Can you provide a savegame with the issue clearly in the forces technologies?

Save and mods: https://yadi.sk/d/xmnG42Jx3Hehhk

EDIT: Available research is "2-3", but current mining productivity bonus is 10%. Not bad)))
EDIT 2: I've got to research "7" right after "2-3". So, now bonus is 14% while (not after) researching 7th level.

I notice that there can be some inconsistency in the way the mining productivity research is reported. Perhaps this is the issue? I have vanilla 0.15.6, no mods.

I have done mining 4 as confirmed by 8% increase in productivity. The next available research is mining productivity 5. However the tech tree seems to suggest that my last completed research was mining productivity 3, mining 4 is missing from the tree entirely. Screenshots attached.

On an unrelated note, I LOVE 0.15. It just keeps getting better. Thank you devs for so many hours of fun

I have to say that the way it is reported is little bit confusing. 5-7 actually means 5 out of 4-7, so 4 is already researched.

My current status is on the pic. Tech gui shows 7th level reached, but the next research and the bonus show 9th level reached.