I think you have somehow picked up an overcomplicated workflow, and this is case is actually something that `jj` is much better at.

If I'm in the middle of working on <foo> and someone asks about <bar>: `jj new <bar>`. When I'm done (and do whatever I want with those new changes in <bar>, including deferring deciding what to do), I just `jj edit <foo>` and I'm back exactly where I left off. It's a bit like `git stash` without having to remember to stash in advance, and using regular commit navigation rather than being bolted on the side.