Ok so the buttons are working, which is a cool added bonus. 1st slot top left is more reliable now, had no issues with it. 2nd slot top left is still a game of roulette, sometimes it highlights like normal, but when i go to click it doesn't do anything, other times it doesn't highlight at all... in about 5 min of testing I was unable to grab the item out of that second slot. Is there a log I can send you? If you'd like I can actually just send you a zip of my entire mod folder, I don't think there's anything that should be interfering, but maybe?
Updating with more info, it looks like it's impacting the workbench and the campfire the worst... with forge i was able to grab item from output slot two, and place back. With workbench I couldn't grab at all, and with campfire I was able to grab but can not place back.