Problem Details : In the case of iOS, the image to be displayed in the pop-up message within the TypeScript application does not appear during file download. An error occurred trying to load the resource when attempting to fetch the image (in the case of Safari). The image does not appear in Edge or Chrome either, besides Safari. The image is displayed correctly on Windows 10, 11, Mac Ventura, Mac Sonoma, and Android. Neither svg format nor png format images are displayed. Only in the case of iOS, a download modal appears in Safari (In Edge and Chrome, a different display asking whether or not to download appears, which is different from the modal). The issue only occurs when the download modal display and the image fetching for the pop-up are conducted simultaneously. If you delay the display of the download modal from the timing of fetching the image for the pop-up (apply a wait), the image can be fetched. Verification Environment: iOS v.17.5.1 Safari 604.1 iOS v.17.3 Safari 604.1 IOS v.17.4.1 Chrome 126.0.6478.54 IOS v.17.4.1 Edge: 125.0.2535.72 Consideration and Request: Based on the problem details, I am considering that this issue might be a bug in iOS. I would like to know from experts whether this event is a bug or a specification of iOS. If there is any information about similar events occurring, I would like to know. If there are any solutions, hints, or advice, I would appreciate it if you could provide them. If additional information is required from me, I would like to be contacted. Thank you for your cooperation.