Fix edge case of remote downsamplers crashing when no input is provided #1982

Job	Run time
mypy-typechecking	2m 54s
isort	5m 10s
flake8	5m 15s
black	2m 47s
pylint	4m 1s
Build + Test (C++) (Release, gcc, g++, 11)	48s
Build + Test (C++) (Release, clang, clang++, 14)	49s
C++ Test Coverage (gets coverage of main branch, currently not main branch because no C++ on main)	1m 57s
Build + Test (C++) (Release, clang, clang++, 17, true)	2m 18s
format	9s
Build + Test (C++) (Debug, gcc, g++, 11)	42s
tidy	1m 12s
Build + Test (C++) (Debug, gcc, g++, 12)	52s
unittests	11m 10s
Build + Test (C++) (Debug, clang, clang++, 14)	41s
Build + Test (C++) (Debug, clang, clang++, 17, true)	2m 3s
Build + Test (C++) (clang, clang++, 14, Tsan)	59s
Build + Test (C++) (clang, clang++, 14, Asan)	1m 14s
Comment Coverage Results	3s
integrationtests-debug	0s
integrationtests-asan	0s
dockerized-unittests	0s
integrationtests-release	0s
integrationtests-tsan	0s
	45m 4s

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