Issue Summary

This is reproducible on Data Center: (yes) 

Steps to Reproduce

Create a Parent Page root page, and create the following child pages under it (the case below is important):

• child page 2
• child page 4
• Child page 1
• Child page 3

Go to browse space -> pages -> tree and navigate to the test root page, manually re-order the pages so that the 'sort alphabetically' icon appears.

Click the 'sort alphabetically' icon and notice the new order:

• Child page 1
• child page 2
• Child page 3
• child page 4
  (case sensitive re-order)

Refresh the page tree page or navigate back to the root page and display children at the bottom, and see that the actual order is different to what the page tree original displayed upon resort:  

• child page 2
• child page 4
• Child page 1
• Child page 3

(case insensitive re-order)

Expected Results

• Pages are sorted alphabetically as they should

Actual Results

• Pages remain in the same order when the page is refreshed.

Workaround

Rename the page with capital letters or keep the lowercase letter but rearrange the page manually.