Powerpoint slide fails to show if the title contains an emoji that has a text drop-shadow applied.

This behavior matches known PowerPoint issues where certain visual effects on text (such as shadows) can cause crashes or slides to fail to display, similar to the documented PowerPoint 2010 crash when transitions and VBA interact.

To work around the problem when a slide title contains an emoji with a text drop shadow:

1. Remove the text shadow from the emoji in the title:
   • Select the title text box.
   • Select only the emoji character(s).
   • Remove the shadow effect from the text (Format Text Effects → Text Effects → Shadow → No Shadow).
   • Test the slide show again.
2. If a shadow is required visually, replace the text shadow with a graphic:
   • Create the emoji with shadow as an image (for example, via a screenshot or graphic tool).
   • Insert the image into the title area or slide body instead of applying a text shadow to the emoji.
3. If the issue persists across multiple slides or files, repair or reinstall Office, as similar rendering/formatting issues have been resolved by reinstalling in other PowerPoint cases.

If this is a regression in a specific build, updating to the latest Microsoft 365 build may include fixes similar in nature to past hotfixes that addressed PowerPoint crashes caused by specific formatting or transitions.

References:

• PowerPoint 2010 crashes when you view a presentation as a slide show that includes a slide transition
• Performance issue when a slide contains a large image in PowerPoint 2010
• How to troubleshoot a damaged presentation in PowerPoint
• PowerPoint Slide Master Formatting Not Applying - Microsoft Q&A
• PowerPoint Changes When Opened on Different Computer - Microsoft Q&A