BALL X PIT: Bag Maker Achievement - Where?

The problem

It's my last achievement to find! (along with the one you get for having all the rest) but I don't see more more Blueprints listed anywhere?

What players suggest

EDIT: this WORKED! So I noticed - I built the "Bag Maker" building a long time ago! BUT I don't have the matching achievement, and this is the last achievement to get 100% WHat could be going on here? (Should I destroy the building, and build it again? could that work?) --- Yes, it did! Somehow the achievement was not recorded the first time, but it worked this time.

So, I unlocked the BallBearer and the Hoarder, but still I can't find the Bag Maker! Devs, could this be a glitch that I have never seen this blueprint? There is still another issue with balls getting "stuck" bouncing back and forth at high speed. The best workaround I have found is: change the speed of the gameplay back and forth untill these balls finally leave the screen.

EDIT: this WORKED! So I noticed - I built the "Bag Maker" building a long time ago! BUT I don't have the matching achievement, and this is the last achievement to get 100% WHat could be going on here? (Should I destroy the building, and build it again? could that work?) --- Yes, it did! Somehow the achievement was not recorded the first time, but it worked this time.

Video guide