FOLLOWUP - while the PI indicated does not in fact appear to be related to this issue I can confirm the browser UI now displays unique endpoint information instead of generic parent info again with Jamf Pro 10.36.1. Thank you to all who echoed my sentiment to Jamf Support / Engineering that this needed resolution!
Per @AVmcclint suggestion I have submitted a feature request with an unappealing but descriptive and functional a title: Revert/Resolve Jamf Pro UI per PI-010471 - to display specific names in browser window/tab headers
In 10.34 and earlier my tabs looked like this with differentiated headers, that is tab would display the name of the computer / group / policy / profile / script loaded in that tab, such as "Jon's Mac" "Needs Latest macOS Update" "Display Update macOS Dialog" "Restrict macOS Updates" and "checkinaftermacosupdate.sh" :
After 10.35 upgrade all the tabs now retain the value of the parent (i.e. just Computer / Smart Group / Policies / Configuration Profiles / Scripts):
This may only be an issue with jamfcloud hosted instances or possibly multiserver environments. Are you seeing it? Have you let your support personnel know you need it fixed so you can get back to working usefully in multiple tabs?