This bug is client only
I build alchemy lab - 5x5 for example, then I am able to queue 4 potions (1 per prop). When I use them, I am not able to queue anymore potions because game thinks that my potions are still ready to use (they are not). The only way to queue more potions is to sell alchemy lab and rebuild it.
Not sure if all potions cause this issue, I use spirit worker one.
Customer support service by UserEcho