Fix freebuff grace-period hang where UI looks stuck streaming #6152

Job	Run time
build-and-check	3m 6s
test-integration-packages/billing	1m 6s
test-integration-packages/internal	1m 9s
test-integration-cli	45s
test-integration-sdk	1m 15s
test-integration-common	47s
test-integration-web	43s
test-integration-packages/agent-runtime	51s
test-packages/agent-runtime	41s
test-cli	1m 0s
test-.agents	45s
test-packages/billing	43s
test-sdk	44s
test-common	39s
test-web	1m 47s
test-packages/internal	51s
	16m 52s

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