There's nothing to speak of that issue.
As far as I know, 'nothing' cannot be the subject/person who can speak of something. I think the sentence is: There's nothing (for us/you) to speak of that issue.
"Nothing" as in I have nothing to speak of is the object of "speak of" as well as "have". But I don't see "nothing" is what as in there is nothing to speak of that issue.
anonymous There's nothing to speak of that issue. No. That's not correct.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
anonymousThere's nothing to speak of that issue.
No. That's not correct. It should be
There's [nothing to speak of] [on that issue].
where 'on' ~ 'with respect to' ~ 'with regard to'
CJ