Gromp resetting

i was playing Sion in the jungle my bottom lane Lucian and Leona were leashing me i charged my q hit at max but Leona accidentally aggro-ed the gromp when she returned to lane gromp reset instead of fighting me so i fought him again no big deal except when he was about 10% health gromp decided he wanted to fight Leona again running toward bot lane until he lost all of his patience resetting again this happened again the third time where i died to gromp and the 4th time when i returned to see if the bug had just been me continuously auto attacking gromp after leona left it wasn't and gromp reset again