Hey Alex, I just upgraded from 4.2.14 to 4.2.17. After the upgrade, all the icons in the admin area are unlogical. For example, when I browse user, the edit icon is the OTO icon, delete user is the email icon, etc. What happened?
Yes. Always be sure to clear your browser cache / cookies and restart after an upgrade to ensure no legacy byproduct. Also consider if you are using a CDN or cloud service (like CloudFlare) that you will also need to clear their cache as well.