[R] Best way to tackle this ICML vague response?

Going through ICML submission for the first time. I had a reviewer ask for some things and during the rebuttal period I ran more experiments and answered all their questions (they wrote 3 weaknesses). Yesterday started the author-reviewer discussion period which ends on April 7.

In their response to my rebuttal the reviewer wrote in one line that my "experiments greatly improved the paper" but "some details remain only partially clarified". That's it... They marked "Acknowledgement: (b) Partially resolved - I have follow-up questions for the authors."

The ICML email state that I can "post up to one additional response to any further reviewer comments that are posted, as a reply to your rebuttal". But since the reviewers didn't actually write any follow up questions I have no idea how to tackle this.

Any suggestions?