Merge pull request #683 from gronniger/fix_modes_in_caching #1759

Job	Run time
Test meow ubuntu-latest 3.12	45s
Test vlsir ubuntu-latest 3.12	39s
Test meep ubuntu-latest 3.11	2m 8s
Test path_length_analysis ubuntu-latest 3.12	56s
Test palace ubuntu-latest 3.11	57s
test_code_coverage	1m 51s
Test femwell ubuntu-latest 3.12	30s
Test klayout ubuntu-latest 3.12	39s
Test sax ubuntu-latest 3.12	42s
pre-commit	23s
Test tidy3d ubuntu-latest 3.12	46s
	10m 16s

Provide feedback