Reset All Personalization does not reset changes

Hello SAP Launchpad Service Team,

we're using the personalization service (/comsapperso/flex/personalization/) of the BTP Launchpad Service to allow our users to personalize the custom Fiori Elements apps that we've deployed for them. For one user we run into the issue that the Object Page of a List Report Object Page app can't be opened anymore due to the error "adding element with duplicate id". This happens for the user also when starting in incognito mode. Other Users are not affected by this issue. So I've tried the "Reset All Personalization" button in the Settings menu:

Unfortunately this seems to have no influence on the stored personalization. When launching our app the json returned from:

/comsapperso/flex/personalization/v1/data/appid

still does return an array of changes:

I've already tried if deleting the user in the BTP Subaccount would also delete this personalization. But unfortunately this didn't had any effect.

I also have an SAP Support Incident open on this topic: 165417 / 2022.

Looking forward for any input.

Best Regards
Gregor