A family of Microsoft on-premises document management and storage systems.
Hi @Nicolae Anghel ,
It's not a bug. This seems to be the browser related issue.
I just did a test in Chrome and IE. This issue doesn't exist in Chrome, the "is-selected" class would be applied to current page. Only IE browser has the issue.
And I just installed the lastest update KB 4486714 today, this issue doesn't exist in this update. However, there are some issues on creating page and editing page, I didn't recommend you install on your production environment.
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