Tirmidhi narrates that Bukhari rejected narrations narrated by Hassan b. Ali.
Mishkat al-Masabih 367
Narrated Abu Huraira:

Abu Huraira reported God’s messenger as saying that Gabriel came to him and said, “When you perform ablution, Muhammad, sprinkle yourself.”

 

Tirmidhi transmitted it and said, “This is a gharib tradition, and I heard Muhammad (i.e. Bukhari) say that the traditions of al-Hasan b. ‘Ali al-Hashimi the narrator are rejected.”

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: " جَاءَنِي جِبْرِيلُ فَقَالَ: يَا مُحَمَّدُ إِذَا تَوَضَّأْتَ فَانْتَضِحْ ". رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ غَرِيبٌ وَسَمِعْتُ مُحَمَّدًا يَعْنِي الْبُخَارِيَّ يَقُولُ: الْحَسَنُ بْنُ عَليّ الْهَاشِمِي الرَّاوِي مُنكر الحَدِيث
Reference  : Mishkat al-Masabih 367
In-book reference  : Book 3, Hadith 78