KNOW THAT IT is mustaḥabb for a follower, when he sees his Shaykh or anyone else who is a role model do something contrary to that which is known [to be correct], to question him with the intention of seeking guidance. If he did it forgetfully then he will be reminded; and if he did it deliberately, and it is correct, he will explain it to his follower.
We relate in the Ṣaḥīḥs of al-Bukhārī and Muslim that Usāmah ibn Zayd 
said: “The Messenger of Allah 
set off from ‘Arafāt. When he reached the mountain pass he dismounted. He urinated and performed wuḍū’. I said: ‘The ṣalāh, Messenger of Allah?’ He replied: ‘The ṣalāh is ahead of you.’” [1].I say that Usāmah only said that because he thought that the Prophet had forgotten the ṣalāh of Maghrib, for its time had already begun when he was about to set off.”
said: “The Messenger of Allah set off from ‘Arafāt. When he reached the mountain pass he dismounted. He urinated and performed wuḍū’. I said: ‘The ṣalāh, Messenger of Allah?’ He replied: ‘The ṣalāh is ahead of you.’” [1].I say that Usāmah only said that because he thought that the Prophet had forgotten the ṣalāh of Maghrib, for its time had already begun when he was about to set off.”We relate in both of their Ṣaḥīḥs that Sa‘d ibn Abī Waqqāṣ asked: “Messenger of Allah, why do you turn away from So-and-so? By Allah, I consider him a believer.” [2].
asked: “Messenger of Allah, why do you turn away from So-and-so? By Allah, I consider him a believer.” [2].And in the Ṣaḥīḥ of Muslim there is [a hadith] from Buraydah that the Prophet performed all the ṣalāhs on the Day of the Conquest [of Makkah] with a single wuḍū’. ‘Umar said: “You have done something today that you have never done before.” He said: “‘I did it deliberately, ‘Umar.” [3].
that the Prophet performed all the ṣalāhs on the Day of the Conquest [of Makkah] with a single wuḍū’. ‘Umar said: “You have done something today that you have never done before.” He said: “‘I did it deliberately, ‘Umar.” [3].There are many similar narrations to these in the Ṣaḥīḥ which are very well-known.
References
[1] Al-Bukhārī (139) and Muslim (1280).
[2] Al-Bukhārī (1478) and Muslim (150).
[3] Muslim (277).