I suspect your problem could be citrus leaf miner, especially at this time of year. The moth's larvae mines through new leaves, causing them to distort and get ragged. Read our handout about this pest:
https://sloatgardens.com/wp-content/uploads/2015/09/citrus-leafminor.pdf Another possibility is young snails. Applying Sluggo or Sluggo Plus around the base of the tree may help.