After upgrading from Helsinki to Istanbul, browsers may continue to use cached icons from Helsinki instead of downloading the updated icons from Istanbul. This causes items in the UI to display the wrong icon. This applies only when upgrading from Helsinki 10 or later to an Istanbul Patch between 4 and 9. Upgrading from releases earlier than Helsinki Patch 10 should not produce this error, and upgrading to releases later than Istanbul Patch 9 should not produce this error.
Steps to Reproduce
- Install Helsinki Patch 10 or 11.
- Connect to the UI with a web browser to cache the icon assets.
- Upgrade to Istanbul Patch 4 through 9.
- Refresh your browser.
Note that some of the icons in the header and navigator are incorrect.
Related Problem: PRB1199371