Lightroom Mobile for iPad – Mask Overlay Display Issues When Adding or Subtracting Masks

Device: iPad Pro 13-inch (M4)
Operating System: iPadOS 27.2
Lightroom Version: 12.0.0 (EEF033/265)

Description

I am experiencing multiple mask overlay display issues in Lightroom Mobile on my iPad Pro.

The actual masking and editing functionality appears to work correctly. However, the mask overlay is displayed incorrectly when adding or subtracting masking components.

Issue 1: Mask overlay disappears when subtracting with the Brush

1. Create a mask using Select Subject.
2. Select Subtract → Brush.
3. Start drawing on the image.

As soon as I start drawing, the entire original mask overlay disappears.

The subtraction itself works correctly, but I can no longer see the original mask boundaries while refining the selection.

Issue 2: Mask overlay extends across the entire image when subtracting with gradients

1. Create a mask using Select Sky.
2. Select Subtract → Linear Gradient.
3. Draw a linear gradient across the image.

The mask overlay is incorrectly displayed across the entire image instead of being restricted to the original sky selection.

The same behavior occurs with other masking tools, including Radial Gradient.

Importantly, the actual adjustments are still restricted to the original sky mask. Only the visual mask overlay is incorrect.

Expected behavior

The mask overlay should always represent the actual combined mask, including all additions and subtractions.

When subtracting a linear or radial gradient from a sky mask, the overlay should remain restricted to the selected sky area.

When subtracting with the Brush, the original mask overlay should remain visible throughout the editing process.

Additional information

• Both issues occur with every photo tested.
• The behavior is identical when using the Apple Pencil or finger.
• Mask Overlay → Show Always is enabled.
• Tool Overlay → Show Always has also been tested.
• Changing overlay settings does not resolve the issue.
• The same operations work correctly on my iPhone. The mask overlay accurately follows the combined mask and remains visible during brush adjustments.

This appears to be an iPad-specific mask overlay rendering issue introduced or exposed in Lightroom Mobile 12.0.0.

Please investigate both issues.