If you look into WinAccessible - https://github.com/openjdk/jfx/blob/1f6257086422cdc3b0cb01de3ef9bbc3137cfa30/modules/javafx.graphics/src/main/java/com/sun/glass/ui/win/WinAccessible.java#L302 you see that it reports back that CHECK_MENU_ITEM supports the TogglePattern.

But sendNotification() does not respect that and handles it as it would implement the SelectionPattern -
https://github.com/openjdk/jfx/blob/1f6257086422cdc3b0cb01de3ef9bbc3137cfa30/modules/javafx.graphics/src/main/java/com/sun/glass/ui/win/WinAccessible.java#L577

This leads to the effect that:
- Narrator and Jaws do not correctly announce the ToggleState change
- NVDA works appropriately