How many attempts did you make before writing? I've just replayed the level. On the first attempt the nut fell but not the cherry. On the second I completed the level in just 4 moves. So, no bug.
I'm also having the same issue where only the cherry falls but the acorn doesn't fall down into the "main area". I've played this level about 15 times today and the acorn doesn't drop.
I'm also having the same issue where only the cherry falls but the acorn doesn't fall down into the "main area". I've played this level about 15 times today and the acorn doesn't drop.
Acorn finally dropped on the second day of trying to beat this level.