Toolbar buttons lose images when clicking at design time

[JackTrapper]

Tested

• Delphi 10.3: Fails
• Delphi 10.4: Works

Steps to Reproduce

1. Create a project
2. Add an ImageList, add a sample image
3. Add a Toolbar
4. Assign the ImageList to the Toolbar.Images property
5. Add some ToolButtons. (select an ImageIndex for the ToolButtons)
6. Click the toolbar buttons

Delphi 10.3