Common UI - Can't change Navigation to anything other than the default "Escape" on 5.5

Hello, I have a project that uses Common UI, and I have custom widgets that use custom navigation, like a slider or switcher that changes when we go right or left with a gamepad. It allows for increasing or decreasing the slider with the controller, and the same for the switcher.

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But when I try to set the Navigation to anything other than the default “Escape”, it does nothing. Like the menu open, I can click on “Custom”, but it just instantly closes the menu:


When I do the same on “primitive” widgets like the default slider, it works, but not on custom ones. On 5.4, there was no problem; it was introduced in 5.5.

It was discovered on #29 of my project.