api: fix handling of multiple conditions for buffering #570

Job	Run time
pytest-docker-py310-icx-omp-base	4m 29s
pytest-docker-py310-gcc-omp-adjoint	29m 16s
pytest-docker-py310-gcc-omp-base	3m 44s
pytest-docker-py310-gcc-omp-arm64-base	3m 50s
pytest-docker-py310-gcc-omp-arm64-adjoint	26m 13s
pytest-docker-py310-icx-omp-adjoint	30m 41s
pytest-ubuntu-py310-gcc14-omp-adjoint	35m 29s
pytest-ubuntu-py310-gcc9-omp-adjoint	36m 17s
pytest-ubuntu-py312-gcc12-cxxomp-adjoint	41m 23s
pytest-ubuntu-py311-gcc11-cxxnoomp-adjoint	35m 48s
pytest-ubuntu-py311-gcc10-noomp-adjoint	32m 54s
pytest-ubuntu-py310-gcc14-omp-base	49m 46s
pytest-ubuntu-py311-gcc10-noomp-base	46m 1s
pytest-ubuntu-py310-gcc9-omp-base	49m 32s
pytest-ubuntu-py312-gcc12-cxxomp-base	58m 5s
pytest-ubuntu-py313-gcc14-omp-adjoint	39m 50s
pytest-ubuntu-py312-gcc13-omp-base	56m 20s
pytest-ubuntu-py313-gcc14-omp-base	53m 55s
pytest-ubuntu-py312-gcc13-omp-adjoint	40m 1s
pytest-osx-py312-clang-omp-base	33m 50s
pytest-ubuntu-py311-gcc11-cxxnoomp-base	49m 35s
	12h 36m 59s

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