Bug: Metadata-hash differs from v15 and v16

[al3mart]

Even after #307 polkadot-api/check-runtime keeps reporting metadata diffs between versions.

✖ An issue was found with this runtime:
The metadata-hash differs from metadata v15 and metadata v16

Root cause needs to be correctly identified.

🔗 zboto Link

[al3mart]

There's a tracking issue here: polkadot-fellows/RFCs#148 (comment) for this.