Fix pickling state #2873

Job	Run time
Pixi lock	5s
Run pre-commit	20s
Setup workflow	4s
core:test-core:ubuntu-latest	2m 43s
ui:test-ui:ubuntu-latest	2m 22s
unit:test-39:ubuntu-latest	16m 31s
unit:test-312:ubuntu-latest	18m 17s
unit:test-39:macos-latest	12m 45s
unit:test-312:macos-latest	15m 52s
unit:test-39:windows-latest	27m 3s
unit:test-312:windows-latest	29m 46s
unit:test-numpy:ubuntu-latest	17m 29s
	2h 23m 17s

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