Page with title 'calendars' is not accessible from Page Tree

Issue Summary

This is reproducible on Data Center: (yes)

Steps to Reproduce

1. Create new page with title calendars and publish it 
2. Navigate to the newly created page in the Page Tree and click on it to access its contents

Expected Results

Page content should be displayed.

Actual Results

Redirection to space Calendars <confluence base URL>/display/<space key>/calendars

Workaround

To access page use <confluence base URL>/pages/viewpage.action?spaceKey=<space key>&title=calendars URL instead