Currently there are only 3 bugs.
1) Certificates can't create seals, is fixed on the test server thou
2) Belt inventory is acting weird. However when you report a problem try to be more specific, saying potion doesn't help us, cause for instance auto potion works fine on the belt.
3) Pet disappear upon death, we are currently working on that
I tried with different Potions: Mana Potions L , Heal Potions L , Empty Bottle , Purple Potion L , Green Potion M.
All seem to disappear from fast access when I put them in the Belt.