Fix sensor bug. #9276

Job	Run time
benchmark (e10_drive)	3m 11s
examples-rl (e10_drive)	6m 18s
base-tests (./cli)	4m 9s
benchmark (e11_platoon)	2m 0s
examples-rl (e11_platoon)	2m 54s
base-tests (./envision)	3m 17s
base-tests (./smarts/core --nb-exec-timeout 65536 --ignore=./smarts/core/tests/test_notebook.py)	5m 34s
base-tests (./smarts/env --ignore=./smarts/env/tests/test_rllib_hiway_env.py)	4m 32s
base-tests (./smarts/env/tests/test_rllib_hiway_env.py)	3m 6s
base-tests (./smarts/sstudio)	2m 43s
base-tests (./smarts/ray)	3m 13s
base-tests (./examples/tests/test_examples.py)	4m 57s
	45m 54s

Provide feedback