Hi Aanjan Ravi, any updates? Other customers seem to have the same problems.
Pascal, just to check, what version of ThingWorx are you using? I see that one of the associated enhancements on how Alerts functions has been fixed on 7.3.0. I'll confirm with the local team and update the thread.
It has been fixed on 7.3.0. You can use 'AcknowledgeAlertFromSummary' to acknowledge and 'DeleteAlertFromSummary' to delete specific Alerts respectively.