It could very well be possible that you're either unlucky or that the wrecks you're salvaging have all the new tech destroyed, or that it's simply not that much ahead of your civilization in tech, if at all.
Also, for clarity, an Error is when the game outright pops a little pop up window saying something went wrong, or otherwise logs such. A bug is when something doesn't behave properly or otherwise as intended. Two different things, even if they can overlap quite a bit at times.
After I took two or three launcher miniaturisation and reload techs, I am ages in front of them in tech. Thing is, I have 400+ wrecks from theses guys sitting in my system. And while it is annoying as hell when the game stops with "new" intelligence this is not what is happening here. That is intended behaviour. But this window about disassembly does not pop for each and every one. What is happening is that on some of those wrecks, while at the same time as all the other error messages (but not always) , this message pops as well. No it is not an error message as such, but I still maintain that its appearance is a bug or somehow connected to a bug.
And really, if that message was supposed to pop for every wreck where I know everything about the ship, why does it not pop for my own ships?