Done regrowth uhc. items disappearing.

i had 8 nightshades down and i go afk for a bit i come back and they are all gone, is this a feature(as in they only provide a certain amount of mana before poof) or a bug? also each time i place a mana pool down my mana spreader will disappear. your help is much appreciated.

 

Passive mana generating flowers disappear after two minecraft days.

 

yea someone on the server let me know right after i posted this which is why it was marked solved by the time you answered

 

Yet now other who have the same issue will also know the answer.

 

Aren't Hydrangeas passive generation also?

Since they are just dropped into an infinite water source and never require another input?