So, I activate the double exp scroll, what happens is this:

I took full inventory of yew logs and light it, so I was looking at the time also while lighting. It all went well with 2.8k exp, until around 4mins ++ left, the yew logs only give me 1421 exp. I was surprised, so I continue lighting to try again, and it give 1421 exp. Idk how this happen, can it be due to a lag?

Another bug found:

Upon finishing the double exp scroll, sometimes it doesn't states the double exp has ended. I had try a couple of double exp scroll and seen the effect. Also, the timer is out of sync, you can still get double exp even the countdown timer disappears. Then, it doesn't says double exp has ended.