Since updating to v.39, construction robotics is not researchable in my game. Just updated to .41 which did not resolve the issue. I did originally begin on a different version, but I do not remember which.

I have the generic "Robotics" research completed, but neither construction robotics or logistics robotics are researchable from the tech tree. Worth noting that I skipped steam robots altogether, but these technologies are not linked in the tree.

Probably got to Electric age before the prerequisites were fixed, it appears Steam robots aren't linked because they are one of many prerequisites for Electricity age.

They are also part of the recipe for the electric robots.

This sounds correct, I thought that was a deliberate design choice for whatever reason and "skipped over" large portions of the steam tree

Is there a way to fix?

Click on the Electricity age technology and research the prerequisites.

Can confirm that this worked, thanks!

Would like to report a separate issue: there doesn't seem to be a technology that unlocks the various logistics chests (provider / requester / storage etc). The steam logistics chests are available, but these don't function with electric robots. I can navigate to the various logistics chests from the factoriopedia, but there is no technology listed there (or on the tech tree) that unlocks the chests.

There are EI specific logistic chests unlocked with EI containers technologies.

Vanilla logistic chests will be hidden from Factoripedia in 1.2.44.

Shouldn't those new chests become available together with the electric robots/roboport, or at least at the same tech level? They are locked behind computer age now instead of electric age. Leaves me in a weird spot where roboports are electric but chests still require steam to work.

Yes, this is why I was confused, I could research Logistics bots but without chests, what's the point? Maybe add an electric age tech that only gives the EI storage chest? At least then you could use the personal logistics trash function.

All logistic bots and chest types are interchangeable and tested working together.

They are intentionally staggered to produce novel game-play loops.