This shows that it is forbidden, or disliked - to say the least - for a man to pray with his hair tied back, and this - from what is apparent - includes canerow

Ibn 'Abbas radhiyallahu anhu, who narrated the previous hadeeth, saw 'Abdullah ibn Al-Haarith praying with his hair plaited/tied behind his head. So ibn Abbas undid his hair. After the prayer, Abdullah ibn Al-Haarith asked him why he did that. So Ibn 'Abbas replied: "I heard the prophet ﷺ saying: “Whoever prays with hair plaited/tied behind their head is like someone who prays with his hands tied up.” [Reported by Muslim] Sheikh 'Abdulmuhsin Al-'Abbad hafidhahullah said: ”وسواء جعله ضفائر وجمعه وراءه أو جمعه وحزمه من ورائه.“ “It doesn't matter if the hair is braided and gathered behind him or he collects it together and ties it behind him (i.e. Both are included in the prohibition).” [His explanation of the hadeeth of ibn Abbas in Sunan Abi Dawud P. 8 المكتبة الشاملة الحديثة] How likely is it for one to undo their braids before each prayer? Very unlikely. Thus a person continues to pray with braids, persisting upon this makrooh act... Warning: Persistence upon a Makrūh act can render it into a minor sin: Ash-Shāṭibī raḥimahullāh said: «فإن الإثم في المحرمة هو الظاهر، وأما المكروهة؛ فلا إثم فيها في الجملة؛ ما لم يقترن بها ما يوجبها، كالإصرار عليها، إذ الإصرار على الصغيرة يصيرها كبيرة، فكذلك الإصرار على المكروه، فقد يصيره صغيرة». “What's apparent is sin applies to [committing] prohibitions (Ḥarām), as for disliked matters (Makrūh), there is no sin applied in general, as long as it is not accompanied by something that necessitates sin, such as persistency upon it, because persistency upon minor sins renders it a major sin, in the same way persistency upon disliked matters may render it a minor sin.” [Al-I’tisam (1/296)] سبحانك اللهم وبحمدك أشهد أن لا إله إلا أنت أستغفرك وأتوب إليك