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. Â Read our handout about this pest:Â
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.