Button width in HorizontalArrangement no longer auto-adjusts on Android

On Android, the width of buttons within a HorizontalArrangement is no longer adjusting automatically.

As a workaround, we are manually adjusting the width.

This worked correctly in the MIT AI2 Companion app on Android versions prior to iOS.

Check you have all buttons set to fill parent, both ways.

:red_question_mark:

"As a workaround, we are manually adjusting the width."
How?