There are many stuck zones. In fact, this level has variable difficulty and the difficulty is entirely dependent on its starting position of the ingredient.
You may have to switch the ingredients to another column multiple times, making your level success rate highly dependent on the starting position of the ingredient.
Sometimes, the first ingredient appears under the empty tiles on 8th row of the board. If this happens, it is almost impossible without boosters, because there are no teleporters to lead to the first row of the board.
This level's difficulty is variable because the first ingredient can appear in one of seven columns (the closer it is to the middle, the harder it is to clear), and its position is purely luck-based.
If an ingredient lands precisely on the conveyor belt, make matches in the top center of the board so that the ingredient does not fall further down! The ingredient will exit on its own, when it reaches the middle of the conveyor belt.
When it comes time for the second ingredient to come down, make vertical matches under the second or eighth column so that it comes down in either of those column and you do not have to move the ingredient horizontally.
Only the rightmost ingredient exit will be used as ingredients can only arrive from the right via conveyor belts. (Unless the player uses two free switches to move the ingredients twice to land in the left ingredient exit, but this would still make the middle ingredient exit entirely useless).