GameStudio crashes when multi-selecting entities in specific scene (ArgumentNullException in IsPrimitiveType / Nullable.GetUnderlyingType)

[dawnmichal]

Release Type: Official Release

Version: 4.2.1.2442

Platform(s): Windows 11

Describe the bug
GameStudio crashes when I select multiple entities at once in the scene editor/hierarchy. Selecting the same entities one by one does not crash. The crash appears related to the property/inspector UI trying to determine a primitive type for a null Type/nullable value.

Expected behavior
Inspector shows a combined selection (or disables mismatched properties) without crashing.

Log and callstacks
CrashReport.txt

Additional context

• This does not occur when selecting entities individually.
• It seems to depend on the specific scene/content. Likely triggered when one of the selected entities has a component/property of type System.Type or a Nullable that is currently null, and the inspector checks IsPrimitiveType without a null guard.
• Unrelated build errors about missing audio assets were present in the log (Audio/Vehicles/Engine01, Audio/Vehicles/skid), but they don’t appear to cause the crash.