$ numberstation otpauth://totp/Biscuits:foo%40example.com?secret=uaqvphgzqy46rrrbjdnqmfg6zzmafjfh&issuer=Bar
The TOTP entry is listed as "Biscuits: foo@example.com"
The TOTP entry is listed as "Biscuits: foo%40example.com"
I think the issue is that the label is URL-encoded, but numberstation does not perform URL-decoding.