Electric generator bug

I apologize in advance if this is already a well discussed topic

I just spent all day grinding the materials to build the electric generator to be able to build two house upgrades at once but it doesn't seem to actually do anything, has anyone else experienced this? Is it intended, and if so what is its true purpose

Edit: After upgrading something on my house I was able to do 2 concurrent upgrades at once, I will leave the post up in case anyone else experiences the same thing