Thanks for reaching out. If it happens on the specific browser and your networking is working well (internet speed and connection), please also make sure that it is not blocked by a browser extension. Browser extensions, such as ad blockers, can prevent images from loading in presentation view.
You can disable the browser extension, or add figma.com to the extension’s allow list. The process for this varies by extension, so make sure to reference the documentation for the relevant extension.
Please make sure you use the email associated with your Figma account, include links to the file in question, and share access with support-share@figma.com. Don’t worry, inviting us to view your file won’t impact your billing.