I don't know why some managed resources are not appearing in the project resource overview

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I keep getting the same message asking to 'save the sheet and reopen the panel' to see the resource updates for a particular person(s), but they still don't appear in the resource overview, once I've expanded the section, after following the instructions. Any help would be much appreciated. Also, I am integrating my teams resource management into a section of individual Smartsheet plans which make up the overall portfolio, but I am not the owner of the Smartsheet, but I have editing capabilities. Could this be the problem?