api: fix handling of multiple conditions for buffering #598

Job	Run time
pytest-docker-py310-gcc-omp-arm64-adjoint	27m 8s
pytest-docker-py310-icx-omp-base	44m 21s
pytest-docker-py310-gcc-omp-base	42m 44s
pytest-docker-py310-gcc-omp-arm64-base	34m 14s
pytest-docker-py310-gcc-omp-adjoint	30m 58s
pytest-docker-py310-icx-omp-adjoint	31m 52s
pytest-ubuntu-py312-gcc12-cxxomp-adjoint	41m 50s
pytest-ubuntu-py311-gcc11-cxxnoomp-adjoint	37m 47s
pytest-ubuntu-py312-gcc13-omp-adjoint	37m 12s
pytest-ubuntu-py311-gcc10-noomp-base	41m 52s
pytest-ubuntu-py310-gcc9-omp-adjoint	36m 39s
pytest-ubuntu-py310-gcc14-omp-adjoint	28m 20s
pytest-ubuntu-py312-gcc13-omp-base	50m 53s
pytest-osx-py312-clang-omp-base	30m 36s
pytest-ubuntu-py311-gcc11-cxxnoomp-base	47m 58s
pytest-ubuntu-py313-gcc14-omp-adjoint	37m 45s
pytest-ubuntu-py312-gcc12-cxxomp-base	57m 29s
pytest-ubuntu-py310-gcc14-omp-base	47m 39s
pytest-ubuntu-py313-gcc14-omp-base	40m 1s
pytest-ubuntu-py311-gcc10-noomp-adjoint	32m 39s
pytest-ubuntu-py310-gcc9-omp-base	50m 26s
	13h 50m 23s

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