I'm glad I am not the only one with this issue, but I am not glad the issue exists at all. I'm hoping the issue gets resolved with the upcoming 1.14.1 patch.
I am having the same issue on my Minecraft Realm. For instance: when I am selling iron ingots, it displays 2 with a 1 next to it and it appears as it only costs 1 iron ingot for 1 emerald. After I pull out my 1 ingot, it removes the 1 emerald as if the discount was not real. It really irks me that this issue occurs to me and anyone else on the Realm. I see that this issue says it is "resolved," but I don't see anything that shows how it was resolved, so I was hoping you could help me out on this issue.
Thanks to the 1.14.1 update, this issue seems to be resolved. I tried it out a few times today and found that I am getting the discounted price. Hopefully you all have the same result.