Summary: After updating to iOS 17.6.1, the splash screen for Progressive Web Apps (PWAs) no longer displays correctly when using a data URL or blob URL as the source for the apple-touch-startup-image. Previously, this method worked as expected in iOS 17.5.1, but now, separate PNG files must be used for each screen size to ensure the splash screen appears. Steps to Reproduce: Create a PWA and add splash screen images using the apple-touch-startup-image link tag with a data URL (or blob URL) as the source. Install the PWA on an iPhone or iPad running iOS 17.6.1. Open the PWA and observe the splash screen behaviour. Expected Result: The splash screen should display correctly using the data URL or blob URL, as it did in previous versions like iOS 17.5.1. Actual Result: The splash screen fails to display, and users must now use separate PNG files for each device screen size, increasing complexity. Impact: This change makes adding splash images to PWAs more cumbersome, as developers now need to manage multiple PNGs instead of generating them programmatically using data URLs or blob URLs. Version Tested: iOS 17.6.1 (Issue Present) iOS 18 (Issue Present) iOS 17.5.1 (Working as Expected) Links: https://github.com/avadhesh18/iosPWASplash (works as expected before this bug appeared) https://github.com/avadhesh18/iosPWASplash/issues/1 (issue with some investigation done on the bug)