I have uploaded the system diagnostic data here: https://feedbackassistant.apple.com/feedback/21749211

We have now narrowed down the issue. This specific CSS class (blurred background image) is causing Safari to behave unexpectedly in Compact and Bottom tab view on iOS 26.2, while the error does not occur in Top tab view. .blurred-background-image { position: fixed; left: 0; right: 0; background-position: center center; background-size: cover; width: 100vw; height: 100vh; -webkit-filter: blur(300px); -ms-filter: blur(300px); filter: blur(300px); z-index: 0; }