Are your Puzzle pieces trapped in Vines? Clear them out by making matches and activating Boosters to set the pieces free!
It may take up to 2 hits to clear them from the board, depending on the number of Vines covering the pieces.
When pieces are trapped in Vines, you can't move them or activate any Boosters that are also trapped, and you're unable to collect any levels goals that are trapped in it until the Vines have been cleared. Any trapped pieces will not fall when making matches under them.
To clear a Vine from the Puzzle board, make matches with the piece that's trapped under it:
Or hit it with Boosters, such as Bombs or Rockets: