For reasons that are unclear, while most preferences that apply in editors are validated, a few are not.
There is a utility in examples/api-samples/src/browser/monaco-editor-preferences/monaco-editor-preference-extractor.ts to help determine which are not.
Check src/vs/editor/common/config/editorOptions.ts for constructor arguments and to make sure that the preference names used to extract constructors are still accurate.
For reasons that are unclear, while most preferences that apply in editors are validated, a few are not. There is a utility in
examples/api-samples/src/browser/monaco-editor-preferences/monaco-editor-preference-extractor.ts
to help determine which are not. Checksrc/vs/editor/common/config/editorOptions.ts
for constructor arguments and to make sure that the preference names used to extract constructors are still accurate.