Fix/guard connection state #628

Job	Run time
Build (docker-linux-arm64)	1m 6s
Build (linux-arm64)	1m 7s
clang-format	24s
Build (linux-x64)	1m 5s
clang-tidy	1m 5s
Build (macos-x64)	1m 8s
Build (macos-arm64)	1m 5s
Build (windows-x64)	56s
Pin Check / Pin Check	12s
License Check / License Check	5s
Build (docker-linux-x64)	1m 7s
Build (cpp-example-collection-linux-arm64)	1s
Build (cpp-example-collection-x64)	1s
	9m 22s

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