fix premature unlock with bond_extra (#267) #770

Job	Run time
cargo-toml-fmt	5s
Cancel Previous Runs	4s
Rust check cargo build --release	2m 43s
Cargo Zepter	1m 4s
Rust check cargo build --release --features dot	2m 46s
Rust check cargo build --release --features ksm	2m 57s
license-check	4m 7s
Rust check cargo test --all --features runtime-benchmarks	3m 7s
Rust check cargo test --all --features dot	2m 54s
Rust check cargo test --all --features ksm	2m 50s
Rust check cargo +nightly fmt --all -- --check	24s
Rust check cargo clippy -- -D warnings	1m 48s
	24m 49s

Provide feedback