Fix crash when running multiple clients on Windows. #2929

Job	Run time
macos-arm64-internal-release	15m 18s
macos-arm64-internal-debug	13m 40s
macos-arm64-external-release	25m 12s
Check for Max SDK	1s
macos-x64-internal-release	19m 9s
linux-x64-internal-release	8m 4s
macos-x64-internal-debug	14m 43s
linux-x64-internal-debug	6m 50s
macos-x64-external-release	18m 23s
linux-x64-external-release	7m 28s
windows-x86-internal-release	21m 35s
windows-x86-internal-debug	18m 16s
maxplugin-${{ matrix.cfg.str }}-${{ matrix.cfg.sdk-version }}	0s
windows-x86-external-release	21m 9s
windows-x64-internal-release	21m 28s
windows-x64-internal-debug	18m 13s
windows-x64-external-release	19m 37s
	4h 9m 6s

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