Nothing seems to be able to pull into a vending machine anymore? All pipe grades and objects seem affected. They just sit in the box and nothing.

I think there is a fix in the works for this. I'm hoping to do another beta release shortly. 

I have released a beta update that should fix this.
https://umod.org/plugins/SyncPipes.cs?version=0.9.31&branch=beta 

Sorry it's taken so long life got in the way :(