[Avodah] V'hu Rachum Authorship

[Moshe Y. Gluck]

Avodas Yisroel (Roedelheim 1868, p. 112) quotes a manuscript dating to 1407
that V’hu Rachum was authored by three people from the Yotzei Yerushalaim,
who were exiled by אספסיינס שחיק עצמות, which refers to, I think, Vespasian.
The problem I have with that is that:
a. Hadrian is the one who was usually referred to with the epithet שחיק
עצמות, and,
b. Hadrian is the one who crushed Yerushalaim in the time of Bar Kochva;
Vespasian wasn't even in Eretz Yisroel in the time of its first capture - he
left and his son Titus took over.

So I see four possibilities:
1. R' Seligman Baer misquoted the manuscript he copied from, and it should
have said Hadrian.
2. It really did say Vespasian, but this author who he's quoting (R' Yehuda
Bar Eliezer Tzvi, student of R' Menachem Shatz of Troyes) was happy that
Vespasian's bones be also crushed
3. The author of the manuscript (R' Yehuda, above) should have written
Hadrian, but he mixed the two up;
Or, most likely:
4. My ignorance of all things historical is showing itself, and I'm
completely missing the boat.

Can anyone help? (I have not yet found anyone else besides Avodas Yisroel to
bring this version of V'hu Rachum's origin, so I have nothing to compare
to.) (Cced some people I thought might be able to shed some light here.)

KT,
MYG