Scan of descriptor QR from Sparrow Wallet not working

Specter Desktop v2.0.1 does not seem to import the descriptor exported from Sparrow Wallet.

- Open a multisig wallet in Sparrow Wallet and press the QR-icon under "Script Policy"
- Open Specter Desktop: "Add wallet" -> "Import from wallet software" -> "Scan".
- Now try to scan the animated QR from Sparrow.

Alternatively download the descriptor as PDF - this does not scan as well:

Sparrow export in the UR split descriptor format.

https://github.com/BlockchainCommons/Research/blob/master/papers/bcr-2020-005-ur.md is the QR format.

https://github.com/BlockchainCommons/Research/blob/master/papers/bcr-2020-010-output-desc.md is the particular encoding for the descriptor.

Start with Specter Desktop's Add wallet → Import from wallet software → Scan flow and reproduce the failure using Sparrow Wallet's animated QR and PDF exports. Read the linked Blockchain Commons UR and output-descriptor specifications to understand the reported split descriptor format. Done means both Sparrow export forms scan and import successfully.

Written by the indexing model from the issue text.