STEPS TO REPRODUCE
- Edit a page
- Make a change and click 'Save' (to save and remain in edit mode)
- Navigate away from the page (click on a link from the breadcrumb or the Wiki logo)
- Click Back (browser button) to return to edit mode
- Make some changes and click 'Save & View'
The page is saved and returned to view mode.
A save conflict warning message is displayed on IE11 and Chrome 74. The issue does not reproduce on Edge 18 and Firefox 67.