Fix flaky testHasMessageAvailableWhenCreated #969

Job	Run time
Formatting Check	1m 35s
Build the Wireshark dissector (ubuntu-latest)	2m 5s
Lint	30m 55s
Run unit tests	21m 38s
Build CPP Client on Windows x86	40m 41s
Build CPP Client on Windows x64	33m 35s
Build with the C++20 standard	5m 51s
Build Alpine x86_64	57s
Build Deb x86_64	52s
Build RPM x86_64	41s
Build CPP Client on macOS with static dependencies	11m 22s
Check Completion	0s
Formatting Check	1m 35s
Build the Wireshark dissector (ubuntu-latest)	2m 5s
Lint	30m 55s
Run unit tests	21m 38s
Build Deb x86_64	10m 48s
Build Alpine x86_64	15m 30s
Build CPP Client on macOS with static dependencies	11m 22s
Build RPM x86_64	12m 2s
Build CPP Client on Windows x86	40m 41s
Build with the C++20 standard	5m 51s
Build CPP Client on Windows x64	33m 35s
Check Completion	4s
	5h 36m 18s

Provide feedback