FB22000213: Segmented picker in toolbar animates icons from scale 0→1 when toolbar changes color scheme

[samhenrigold]

Submission Date

2026-02-19

Status

Open

Area

SwiftUI

Operating System Version

iOS 26.3

Type

Incorrect/Unexpected Behavior

Description

When a segmented Picker with image-based Labels is placed in a toolbar, scrolling through the soft scroll edge effect color boundary causes the picker's icons to animate from scale 0→1 on every transition.

Repro steps:

• Place a ScrollView with different colored content inside a navigation container
• Add a segmented Picker with images to the toolbar
• Scroll through the color boundary

Expected: Icons remain stable while scrolling
Observed: Icons animate from scale 0→1 on every transition between light and dark

Notes:

• Does not reproduce with .labelStyle(.titleOnly) — text content is unaffected
• Does not reproduce with a hard scroll edge effect, but only because the hard edge doesn’t alternate color schemes
• SwiftUI animation modifiers have no effect.

The workaround I discovered was to wrap a segmented control in UIViewRepresentable and call UIView.performWithoutAnimation { view.layoutIfNeeded() } inside registerForTraitChanges([UITraitUserInterfaceStyle.self])

CleanShot.2026-02-19.at.21.36.48.mp4

CleanShot.2026-02-19.at.21.53.10.mp4

CleanShot.2026-02-19.at.22.15.59.mp4

toolbar-picker-bug.tar.gz

Keywords

No response

Prerequisites

• The title follows the format FB<number>: <title>
• I will keep this issue updated with Apple's responses