When me and my friend both look into a crafting table at the same time. For example he put to wood planks into the table to make sticks it showed he could make sticks but it didn't show on mine so I took a plank out and put it back in. There were only two planks in the crafting table. He pulled out sticks and since I took the plank out and put it back in it showed the sticks on mine and it let me pull out the sticks as well and we got to make 8 sticks out of 2 planks because of this glitch. It also worked for beds because we first noticed it with the beds and tried it again on sticks and it worked.

It might be worth noting that RLTweaker includes a fix for this bug (repo, ASM patch), however the fix hasn't been released to CurseForge yet.

That is interesting to note and we could keep our eye on it, but it seems like RLTweaker is made for personal use and adjusts a lot of other things.

Even more to add. When we did it again to dup items. When I stayed the crafting grid it let me pull another hammer so I got two hammer's and he got one hammer so we in total got three items.

And now we got the recipe to pop up on my end and then he took the items from the crafting table and kept them and I just took out 2-3 of the item that was showing on the output without using the items up.

Something is extremely broken here. Um we tried the getting it for free with no items, and when I kept clicking on the output it kept doubling the output and went 1, 2, 4, 8, 16, 32, 64 and I got a whole stack.

So if you keep taking the item out before it can disappear then you can get multiple stacks for free...... He just got 11 stacks for free.

The problem seems to arise from RealBench, which appears to be abandoned. I'm open to suggestions regarding a replacement to try out to see if we can resolve this issue.

How about: https://www.curseforge.com/minecraft/mc-mods/crafting-station
It is just the Crafting Station of Tinkers, which has the same features, like RealBench.
Or for more features https://www.curseforge.com/minecraft/mc-mods/engineers-workshop-reborn
would be also an option.

Your pre-edit suggestion of the standalone tinker crafting station actually sounds pretty good to me. While we don't want TiCo in the pack as a whole, I do quite like the functionality of their crafting station.

Engineer's Workshop Reborn looks interesting but is more advanced than the use case we're looking for (very early game crafting table with inventory-keeping / basic functionality).