I've researched Tera Tech Automation in my saved game, but when I load that game, I'm still not able to build the Tera Tech Assembling machine.

This forum thread describes how to deal with the problem: https://forums.factorio.com/viewtopic.php?t=23837

Another option, and probably a better one, is to run this code on_configuration_changed:

for _, force in pairs(game.forces) do
force.reset_technology_effects()
end

Well, that wasn't quite right. That code will work to get the recipe for the new assembler available. But, running it on_configuration_changed doesn't seem to cause it to be run. I hacked something together, but it wasn't the right thing (I stuck it in the tick function temporarily). I'm not sure where to put it for real.

I write in here because it's the same Topic.
Same Bug as in first Post but for the "Underground Terra Tech Transport Belt", the Long ones are OK but the 2 short recipes are not unlocked for me.
Updated from 0.17.5 to 0.17.7 (skipped 0.17.6)