What is the validity of the statement: "Al-Haythami overlooked it in his tracing of the hadiths!"?

The Shaykh : Abu Usamah Muhammad ibn Makhlad, and he is one whose narrations are abandoned, and Al-Haythami overlooked him! What is your opinion of this expression?
The student : This is a shameful expression, my Shaykh.

The Shaykh : What kind of expression?
The student : A shameful one.

The Shaykh : A sound one?!
The student : A shameful one, a shameful one, meaning it is not correct.

The Shaykh : Yes.
The student : Yes, the overlooking; he did not notice it at first.

The Shaykh : And Al-Haythami overlooked it, and it contains so-and-so, meaning Al-Haythami criticized it due to a person, and this commentator also criticizes it due to another person, saying "and it contains so-and-so, and Al-Haythami overlooked it." What is the perspective here?
The student : I mean, this comment contains an accusation that Al-Haythami overlooked it.

The Shaykh : So, what is the correct view?
The student : That he was unaware of it.

The Shaykh : Do you think he is, I mean, a non-Arab who does not distinguish between the two expressions?
The student: Yes.

The Shaykh : Nor...
The student : The intention is to hint and insinuate, meaning?

The Shaykh : What hinting and insinuating? No, this man is a distinguished scholar.
The student : That is it. Who is this commentator, my Shaykh?

The Shaykh : I do not know him; his name is written here as 'Abd al-Qadus ibn Muhammad Nadeer.
The student : Ah, I mean, it is unlikely that he does not distinguish between the two words, especially since he is a researcher.

The Shaykh : And this hinting, if Al-Haythami had been a contemporary, we would say, by Allah, it is due to contemporaneity.
The student: Yes.

The Shaykh : But.
The student : Unlikely!

The Shaykh : It is not a possibility.
The student: Yes.