Mobile theme color reset button likes to go to #000000 on default color

Reproduction steps

Open settings
Look & feel
(Optional) Ensure Sync theme across devices is disabled (just a precaution in case you have custom tokens you don't want to lose)
Configure theme colors
(Optional) Ensure the two Theme Studio sync options are disabled. same reason as 3. Doesn't actually impact the bug.
Tap on the color dropper for any color
Tap the reset button. If you had a custom color set beforehand, this will reset to the default color. But if you had the default color or do steps 6 and 7 again, it will change that token to #000000

Expected behaviour

When the color is already default, either the reset button shouldn't work or tapping it should do effectively nothing.

Actual behaviour

When the color is already default, tapping Reset makes the color token go to #000000 instead of just staying where it is. When the color is not default, the Reset button works correctly.

Build information

Version 2026.10.100, Beta 5, Channel Beta, Build 2666, Android 16 (arm64), Device Google Pixel 9a, Locale en-US, Push fcm, Flutter 3.47.7, Dart 3.13.5

Platform

Android