I feel like I saw a note a while back saying this behavior was fixed. If so, then it appears it persists in at least some circumstances.
[ ] Android
Obsidian Mobile version: v1.2.0 (50)
iOS version: iPadOS 15.4.1
Buttons of the editor shortcut bar at the bottom of the window occasionally get misaligned vertically with the bar when resizing the window in split view while window has focus. It happens with both an on-screen keyboard and an external keyboard in vanilla Obsidian (sandbox vault, no plugins active).