fix: Ensure `L1Block` is in the cache #2725

Job	Run time
check serde	22s
check no-default-features	26s
check std	23s
clippy	1m 4s
docs	1m 8s
fmt	23s
test no_std	24s
test stable --no-default-features	49s
test stable	42s
test stable --all-features	1m 13s
test beta --no-default-features	56s
test beta	49s
test beta --all-features	1m 11s
test nightly --no-default-features	45s
test nightly	1m 19s
test nightly --all-features	1m 10s
	13m 4s

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