[BugFix] Fix sliced PRB when only traj is provided #10415

Job	Run time
build-wheel-linux (3.8, cp38-cp38, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 37s
build-wheel-windows (3.8, 3.8)	2m 55s
build-wheel-linux (3.9, cp39-cp39, --index-url https://download.pytorch.org/whl/cpu, "['cpu', '11...	1m 35s
build-wheel-windows (3.9, 3.9)	2m 53s
build-wheel-linux (3.10, cp310-cp310, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 33s
build-wheel-windows (3.10, 3.10.3)	3m 8s
build-wheel-linux (3.11, cp311-cp311, --index-url https://download.pytorch.org/whl/cpu, "['cpu', ...	1m 36s
build-wheel-windows (3.11, 3.11)	3m 11s
test-wheel (linux, ubuntu-20.04, 3.8)	2m 29s
test-wheel (linux, ubuntu-20.04, 3.9)	4m 59s
test-wheel (linux, ubuntu-20.04, 3.10)	2m 7s
test-wheel (linux, ubuntu-20.04, 3.11)	5m 38s
test-wheel-windows (3.8)	4m 10s
test-wheel-windows (3.9)	4m 11s
test-wheel-windows (3.10)	4m 54s
test-wheel-windows (3.11)	4m 50s
	51m 46s

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