TL;DR
Restore display of work progress and productivity of laboratoriesProblem:
Starting with version 2.1, the laboratory interface was changed, and the current work and productivity progress was replaced with the overall progress of the current research project.This issue was described (slightly incorrectly) as a bug here:
viewtopic.php?p=695913&hilit=research#p695913
This was responded to by stating that it wasn't a bug, but a change, as displaying the current lab progress didn't make sense.
In fact, the current lab interface design makes less sense. Why display the progress of whole current research in the lab when you can always see it in the upper right corner? Furthermore, this version doesn't provide a visual representation of the productivity module's work progress.
Every 100% of the lab's work added +1 point to the overall research progress, similar to an assembly machine producing +1 unit of product or a drill producing +1 unit of ore.
I agree that this isn't a bug. It's simply an unpleasant negative change to the game's logic and visual clarity.
Solution:
Restore the progress of current lab work with productivity progress display, while keeping the new overall progress feature as it is currently implemented.The concept is below. Everything is in its place, in my opinion. "And the wolves are fed, and the sheep are safe."

