Exact Reproduction Steps ...
Common Factors ...
- it happens to my culture buildings; I can't say about the Builders Hut or Main Hall because they haven't been "helped" within the last 8 hours.
- it happens to my Flurry event building (Snowy charming Tree), Phoenix event building (Burning Egg), and my normal building (Temple of Ages). Those are the only 3 buildings polished within the last 8 hours (according to Notifications, and the Snowy Charming Tree was apparently polished twice in less than 3 hours).
- Moving the building around has no remedial effect, ie. it does not magically become polished again, regardless of [not] being connected to a path; and reloading does not change anything.
- I have completed the Phoenix event's non-daily quests (no idea if/why it could possibly have any impact, but it's the only thing out of the ordinary).
It happens to all my culture buildings - event/no production (Burning Egg), event/production (orc strategist), and ordinary (whispering trees and flying boat).
It happens when they are spelled (EE) and when they are not spelled.
It happens to those connected to a path and to those not connected.
If a culture building should have a bonus effect (it was buffed within the last 8 hours) but it doesn't and a different building gets buffed and the buff works for that building, the broken/buffed building does not change to show the bonus that should be in effect. In other words, if it isn't turned on when the neighbor gives help, it will not turn on simply by the time changing to the time period when help does work.
It does not ever happen to my Main Hall or my Builders Hut. They have correctly given help regardless of time of day.
I have been participating in the Phoenix event, but this bug began for me before I placed any new event buildings. I have not finished the non-daily quests yet.