test: improve coverage for a resolved stalling situation #622

Job	Run time
macOS 14 native, arm64, no depends, sqlite only, gui	1m 5s
macOS 14 native, arm64, fuzz	57s
Windows native, fuzz, VS 2022	57s
ASan + LSan + UBSan + integer, no depends, USDT	1m 4s
Windows native, VS 2022	57s
Linux->Windows cross, no tests	1m 5s
test each commit	0s
Windows, test cross-built	0s
	6m 5s

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