When trashing an Overgrown Estate with Market Square in hand, there was a clicking option in the log called "DRAW_INSTRUCTIONS" for the Overgrown Estate draw effect.
I just saw this happen the other day, when I trashed an Overgrown Estate, Squire, and other cards with one play of Forge. I suspect this issue will be visible any time Overgrown Estate is trashed and there is any other "when trash" effect activated.
Right. In an internal (Renaissance) build that is already changed. So this will most probably come when Renaissance is released online.