If you use sofesticated backup as a means to collect xp and items. Then use pipes to transfer xp in tank or try directly to transfer that xp inside the mob xp jelly bean converter. It doesn't work and xp just doesn't get transferred no matter how many different types of pipes you use in that modpack. Please fix fluid transfer issue. I have deleted and reinstalled the modpack again but I am still facing this issue

Sounds like sophisticated backpacks is using a fluid that isnt tagged as being experience.
Do you know what its called?