Dont remove pages when navigating between tabs, fixes #20398

Editor assessment

The subject communicates the user-visible rule: pages are no longer removed when navigating between tabs, and the inline 'fixes #20398' ties the claim to the bug report. fix(react) and the scope are accurate. The body is absent, which is acceptable for a navigation-logic fix whose subject already states the behavior; the linked issue carries the reproduction. Minor hygiene nits are the missing apostrophe in 'dont' and the issue reference living in the subject rather than a footer. Clarity, however, is immediate.