I help maintain chia_rs, and we exclusively use workspace dependencies, to prevent duplication of versions. But because of this, the Cargo.toml isn't changed for individual workspace members when a version is bumped in the [workspace.dependencies], thus leading to that member being considered unchanged even though it needs to be bumped due to the dependency update.

The versions in the main Cargo.toml also don't seem to be bumped properly, as seen by this commit I had to add:
Chia-Network/chia_rs@8a04437

I'm not sure how best to create a minimal reproducible example, but I'm happy to help if I can. Also, thanks for making cargo-workspaces!