Is the addition "during the time of the Messenger of Allah, may Allah's prayers and peace be upon him," which Abu Dawud mentioned in Shu'bah's narration from Qatadah, considered Mursal (having a missing link in the chain of narration) because Qatadah was a Tabi'i (a successor) and did not attribute it to Anas?

The hadith from Anas, "The Companions of the Messenger of Allah, peace and blessings be upon him, would wait for the Isha' prayer until their heads drooped, then they would pray without performing ablution," includes an addition from Anas indicating that this occurred during the time of the Messenger of Allah, peace and blessings be upon him. The statement of a Companion, "We used to do such-and-such during his time, peace and blessings be upon him," carries the ruling of a Marfu Hadith (a hadith directly attributed to the Prophet); this is because it indicates the Prophet's awareness and approval. What further supports this is what Al-Bukhari and Muslim narrated from Anas, regarding the Prophet, peace and blessings be upon him, standing to converse with a man until his Companions fell asleep, and then they prayed.