The problem with @grid-float-breakpoint is that it's completely unrelated to <dl>s. It's used to determine whether a navbar's items should display as block.
Thanks for reporting this @dbkaplun, I'm not sure where you are seeing that though and was wondering if you could share which file or file(s) you see this in? Thanks!
Sure, I'm almost done with a PR, will update the issue in a sec.
See PR #16563
Closing since #16563 was merged. Thanks!