Missing References or Scripts
Sometimes newly created widgets have missing references, or scripts are missing after the update.
Please try to import package again.
TextMeshPro Support are Disabled After the Platform Switch
In some cases TextMeshPro support can be disabled after the platform switch because of the missing directive in Scripting Define Symbols for the current platform.
Like an upgrade to the new Unity version with the newly added platform and then switch to it.
You need to enable TextMeshPro Support again without saving the scene to avoid references lost.
Newly Created Widgets are White
It happens because of the empty style used as default and it automatically applied to newly created widgets.
Please open New UI Widgets/Styles/UIWidgets Style Default and check it settings (it should not be all white color or null), and set it as default.
If UIWidgets Style Default values are all white color or null, then try to import package again, sometimes import works incorrectly.
You can use “t:UIWidgets.Styles.Style” to find all styles and check which one is used by default.
ListView Item Highlight or Selection Goes to Next Items Automatically
Reason are navigation events raised by a gamepad or joystick, sometimes unintentionally because of sticks drift.
Solutions for the different input modules:
Standalone Input Module:
open Project Settings / Input Manager
find Horizontal and Vertical records with
Joystick Axis(there are two of each, another one for keyboard)
rename those Horizontal and Vertical records to names not used by
Standalone Input Module
Input System UI Input Module:
open Project Settings / Input System Package
add keyboard, mouse, and other required devices to the