Is he who scoffed at the word "Ikhshushinu" from a hadith, playfully considered an apostate, and are his good deeds nullified despite his repentance?

Mocking Allah, His Books, His Messengers, His Angels, His Law, or the sayings (Ahadith) of His Prophet is an absolute act of disbelief (kufr), whether done seriously or in jest. This is based on the Almighty's saying: "And if you ask them, they will surely say, 'We were only indulging in idle talk and play.' Say, 'Is it Allah and His verses and His Messenger that you were mocking?' Make no excuse; you have disbelieved after your belief." This is one of the gravest major sins. However, if it was merely a slip of the tongue, a mistake, or under duress, it does no harm, for the Prophet, peace and blessings be upon him, said: "My Ummah is pardoned for mistakes, forgetfulness, and what they are forced to do." Whoever intentionally engages in mockery, their deeds are nullified, and they must seek Allah's forgiveness (istighfar), repent, renew their marriage contract, and perform Hajj again if they had previously performed the obligatory Hajj.