Even after maintaining full rehit, a person not intentionally (sehaj subhai) commits many mistakes.. This may include hurting others heart, indulging in maya(kam, krodh, lobh, moh, hankar) etc... And who know's about previous karam's.. How bad they were..!!
If after maintaining full rehit a person fails to meet vaheguru (due to above mentioned problems) he would have to re-born but his kamai would help him not to face many difficulties that he faced previously...
Although a gursikh should not worry about mukti, jukti.. His only job is to jap naam and remain in love with vaheguru...!!
Bhul chuk muaf....!!!
Waheguru ji ka khalsa
Waheguru ji ki fateh...!