check_spendable_deprecated usage when receiving ecash tokens

[FiliTol]

The setup used is the following:

• Mint is a self hosted mint, running nutshell version 0.15.3
• Mint is running behind tor
• Mint is reachable and info requests are returning all the details of the mint
• Mobile wallet in use is Minibits, with onion mints option enabled

Using the minibits wallet, I can pay invoices and receive LN sats, thus minting and melting is working fine.
If trying to receive tokens, the following error is raised in Minibits:

Mint returned error on request to swap the received ecash. TypeError: Network request failed.

The following is the TRACE that comes up in the journalctl of nutshell every time I try to receive some tokens minted with this onion mint in a cashu wallet. To make it more readable I formatted with newlines, but this is a single log entry.

mag 14 14:41:45 raspibolt poetry[375589]: 2024-05-14 14:41:45.75 | TRACE | 
cashu.mint.router_deprecated:check_spendable_deprecated:345 | > POST /check: proofs=[Proof(id='', amount=0, 
secret='grfpfwefcesgyT/NTke0PWu07hk8stouKGmnkp/6AkgBEU=', 
Y='02f13d4ddf1bderghfws64baed853e9ded6aa5271e445f38130373d5bba871d021', C='', dleq=None, witness='', reserved=False, 
send_id='', time_created='', time_reserved='', derivation_path='', mint_id=None, melt_id=None), Proof(id='', amount=0, 
secret='flD0q1yWvhkcjybnWQcDi7M3EKb8uhUOGy0uerWe/KG4=', 
Y='022bb98a59e9f60e33a57d568771466ea062267bf0ErTtwad36ae766e8394ea66e15', C='', dleq=None, witness='', reserved=False, 
send_id='', time_created='', time_reserved='', derivation_path='', mint_id=None, melt_id=None), Proof(id='', amount=0, 
secret='tYWEXwqOxiTEMtPfQCcn9YB4k7wrastrs65fy6sYF1dmnrE=', 
Y='021b661aa8ce3e2c7c8ee5ff57a6aa4e36c345tg39cbbe4161fbe2d648d62c85a8', C='', dleq=None, witness='', reserved=False, 
send_id='', time_created='', time_reserved='', derivation_path='', mint_id=None, melt_id=None), Proof(id='', amount=0, 
secret='Tej+xuW0O3cnsI7ZgjwW4U3GYJyIOjK3RTWVKQBZZ64=', 
Y='0207ba90bf86afa8aae6541d1da7687ac38awfgse657b64e75d217fef9480b287c7d271', C='', dleq=None, witness='', reserved=False, 
send_id='', time_created='', time_reserved='', derivation_path='', mint_id=None, melt_id=None), Proof(id='', amount=0, 
secret='kFa2xeeK10yJffl55z/IOOPbJtZ+AIeQ4PkcAdFRTAWKOg=', 
Y='02989eab14d29dfd6e914ef7f81a61666a856ef561a76345r7245483eca6c262720b', C='', dleq=None, witness='', reserved=False, 
send_id='', time_created='', time_reserved='', derivation_path='', mint_id=None, melt_id=None)]

Note that I purposefully slightly changed the values of secret and Y in the pasted logs. No other values have been deleted or modified.