UE5.8 ScrollBox scrollbar only visible on hover in Quest/Android VR

Development Programming & Scripting UI
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Hi,

After upgrading to UE5.8, I’ve noticed a change in UScrollBox scrollbar behavior on Quest/Android VR.

Behavior:

  • :white_check_mark: Windows (mouse): Scrollbar behaves as expected.
  • :white_check_mark: PC-VR: Scrollbar behaves as expected.
  • :cross_mark: Quest/Android VR: The scrollbar is hidden until the pointer hovers over it.
  • :white_check_mark: If Always Show Scrollbar is enabled, the scrollbar is visible all the time.

This worked as expected before upgrading to UE5.8.

I’m applying a custom FScrollBarStyle at runtime using SetWidgetBarStyle() and SetScrollbarThickness(), but the issue persists. The style itself appears to be applied correctly.

Has anyone else experienced this in UE5.8? Is this an intentional change to the mobile/VR Slate behavior, or does it look like a regression?

Any insights would be appreciated.