Tested on single player and the official server. (v.2.0.5)

it is easy to recreate and very early game.

just put an andesite funnel into an andesite tunnel (brass doesn't work) on a running belt, throw the item of your choice to the funnel and that is it.

utterly broken, plz fix soon

Can confirm this is fixed by updating Create to 0.5.1. As 2.0.* heavily relies on create being on 0.5.0 we can't "fix soon" as updating create to 0.5.1 requires a content rework. This content rework is actively being worked on and the development version doesn't have this exploit. I will leave this issue open until 2.1 releases.

And to catch the inevitable question: There is not ETA for 2.1. We're working on it in our free time and we can be burned out. Bugging us about when we'll release it will only burn us out more, as such delaying the release even more.

fixed in 2.1 TM.
any road map to contribute code wise, would love to help :)

There isn't a lot to do codewise. 2.1 is a content update which means thinking of new recipes, quests, etc. implementing those is a matter of a few minutes, but thinking of them takes long.

Can it be fixed inside of create for 2.0? This is pretty game-breaking

No it can't. As stated above 0.5.1 fixed it, which is a 2.1 thing because it requires us to adjust its new contents, update addons etc. sorry!