I picked up materials necessary for a prototype a recipe (here I took enough gold for a lightning rod and electical dooad) near a Science machine and notice the gametab didn't make the lightbulb-pop-up and the "cash register" sound. It happens if the items goes to the backpack.
Steps to Reproduce
Fill your pockets with random stuff. Equip a bagpack. Pick up materials for a prototype near a science machine.
Fill your pockets with random stuff. Equip a bagpack. Pick up materials for a prototype near a science machine.
A developer has marked this issue as fixed. This means that the issue has been addressed in the current development build and will likely be in the next update.