See the gif
https://sm.ms/image/qtv6osJHLORkecC
Cast Bubble then open the chest will duplicate items in chest

Using 1.15.2 Spigot

Hi! Is still being existen the incompatibility at this time? Would be possible to solve it just disabling Bubble or certain stuff from Furniture?

So the steps are

1. Put item in chest
2. Cast bubble around chest
3. Remove item
4. Wait for undo
5. Item reappears in chest?

If so I can not reproduce that... do you have any chest protection plugins or anything similar? Are you able to reproduce this on my dev server or without any other plugins?

I find that it is caused by FurnitureLib.
https://www.spigotmc.org/resources/furniturelibary-protectionlib.9368/

Thank you for letting me know, I will add that to my list of incompatible plugins.