Hover state works on some images but not others in image grid

I am currently working on a project using Adobe Captivate 12.5 and have encountered a few issues that I would appreciate your assistance.  This is my first serious captivate project. Here's a description of one issue I encountered and it has been frustrating:

• I created flip cards using an image grid as a workaround to upload narration since the audio option is not available in the flip card widget.
• The cards flip when the images are clicked, and I have applied the inbuilt image filters for state changes.
• Three flip cards were created using the same settings: the default state is set to "Normal Image," while the hover state is set to "Overlay Image."
• However, only one card functions correctly—its hover state is visible when hovered over. The other two do not display their hover states despite having the same configuration.
• I have double-checked that the hover state is active for all three objects.