Fix/guard connection state #630

Job	Run time
clang-format	43s
Build (docker-linux-arm64)	27m 23s
Build (docker-linux-x64)	33m 22s
Build (windows-x64)	35m 10s
Build (macos-arm64)	9m 2s
clang-tidy	15m 10s
Build (macos-x64)	27m 44s
Pin Check / Pin Check	15s
Build (linux-arm64)	17m 39s
Build (linux-x64)	28m 10s
License Check / License Check	6s
Build (cpp-example-collection-linux-arm64)	6m 40s
Build (cpp-example-collection-x64)	4m 6s
	3h 25m 30s

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