fix kx caching on receive #77

Job	Run time
build-tests	4m 22s
check	1m 43s
build (x86_64-unknown-linux-gnu, ubuntu-latest, true, amd64)	7m 2s
build (armv7-unknown-linux-gnueabihf, ubuntu-latest, true, armv7)	5m 55s
build (aarch64-unknown-linux-gnu, ubuntu-latest, true, arm64)	6m 53s
build (x86_64-apple-darwin, macos-latest)	5m 54s
test (core)	1m 32s
test (rpc)	2m 40s
test (client)	1m 46s
test (engine)	1m 35s
test (daemon)	4m 2s
publish	23s
	43m 47s

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