Spoiler alert: if you don't know which acid that I'm referring to then turn around now.
So near the beginning ish of Amnesia I have retrieved the 4 chemicals from the wine cellar and mixed them into the pot in the laboratory. I noticed that even after filling the pot the chemicals remained in place. I returned to the sealed passage way in the entrance hall and used the acid on the biological substance blocking the passage way. It "dissolved", clearing the path.
I decided to test whether or not I could refill the chemical mixture pot right away, expecting to need more of the acid in the future. I returned immediately to the laboratory without ever crossing through the now dissolved barrier. In the laboratory, I am unable to place the now empty mixture pot back on the table. I am therefore unable to refill it. OK, fair enough. Not logical, but meh...
Defeated, I return to the entrance hall, only to find that the biological barrier has returned. Now I have no acid, cannot make acid, and cannot progress. Is this a bug or am I just doing it wrong?
Thanks!