I spent days crafting all the necessary items to finish the water wheel. I needed to wait a couple of hours for my Master Builder to come of age to complete it. When I came back to the game my second centre piece has disappeared and now I have to waste another god knows how many days crafting all over again! And before anyone asks the obvious, yes i know 100% that it was ready because I tried to complete it with a Trainee Builder to be told 'This villager needs more building experience' (or the equivalent)

This isn't the first time this has happened, its also happened with other craftables, but they weren't an issue as they weren't massively time consuming.

What gives?!

Playing on Xbox One, for what its worth!