(using InputSystem) Making Button/Selectable not react to "Submit" action, but without disabling them

I'm using the new InputSystem and I'm implementing controller navigation in my settings menu and I've set up a bunch of options with buttons that you can choose from by pressing left/right while the button is selected: Applying the options is handled by WestButton (square) on the controller.

Current behaviour:

When pressing Submit, the highlight disappears completely and the BaseEventData's SelectedObject nulls out, leaving no button selected, breaking navigation completely.

Intended behaviour:

When pressing Submit, I want nothing to happen, and the selected button to remain selected, so the user can still cycle left/right to change the option. Turning off button.interactable is not a solution for this case.

I also tried:

• setting up the options with Selectables instead of Buttons but the exact same thing happens

• setting up event triggers on the Buttons/Selectables that do Selectable.Select/Button.Select on Submit and PointerClick to no avail

• making a new Action Map where I removed the "Submit" key bindings, but it breaks navigation too, when I swap it out on runtime, despite it being a complete duplicate of the original Action Map

• disabling the "Submit" value in my InputSystemUIInputModule to no avail:

Any ideas please? Thank you for your time.