Some time between the latest 2 Android nightly builds (#1167, #1168, 2023-08-03, 2023-08-04), the toolbar's Expansion Spacer went broken. It now only shows its text label (literally "Expansion Spacer") instead of doing what it is supposed to do. Appimage version is not affected. But I noticed there is a new "edit" toolbar now, and it's not showing its name in Toolbar menu. Maybe something has been changed in the toolbars that caused this? Tested on Samsung Galaxy Tab S8, OneUI 5.1 (Android 13).
This might have some relation to https://bugs.kde.org/show_bug.cgi?id=438435