KH2: Reduce unnecessary packets sent/requested by the client #20364

Job	Run time
Test hosting with 3.12 on ubuntu-latest	3m 9s
Test Python 3.8 ubuntu-latest	4m 53s
Test Python 3.9 ubuntu-latest	4m 27s
Test Python 3.10 ubuntu-latest	4m 14s
Test Python 3.11 ubuntu-latest	4m 20s
Test Python 3.12 ubuntu-latest	5m 54s
Test Python 3.8 windows-latest	5m 24s
Test Python 3.12 windows-latest	7m 17s
Test Python 3.12 macos-latest	3m 12s
	42m 50s

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