Yes, I have been on an LSA.
The LSAs do their best but they are not infallible, only Baha'u'llah is infallible.
That's how it works, we try to do our best and 'little by little day by day' we change our own selves.
It never unfolds instantaneously. I do see an event will come where Shoghi Effendi said it will be seen in the news and then overnight the world changes, my guess this is when the cities topple, skyscrapers will fall like a stacked pack of cards.
Nearly all the big cities are coastal, built on shifting foundations.
In the end we know that this civilisation and the material greed will vanish, as all civilisations that have reached the same position have faced.
Until then, little by little day by day and it is God that changes our hearts and I see in the writings that we have to be open to that potential, before the gift can be given.
Regards Tony