Android is hanging

When I package the Android ASTC apk, the program is hanging.
Display adb debug log outputs:
Slate: Had to block on waiting for a draw buffer FSlate3DRenderer::AcquireDrawBuffer

the engine version is: ue5.5.3

please help.

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PIE runs smoothly, but the android display is freezing. It keeps logging this message.
This is a screenshot of the game.


This is the full project URL:sample

Same issue:)

This issue is caused by a bug in the RetainerBox UMG widget in the UE5.5 engine on Android.
For a simple fix, we can delete or replace the RetainerBox widget.
In this project, it corresponds to WB_OnScreenInput.(it refers to the mobile attack UI).
The engine bug needs further consideration.

Oh,Thank You very much