Unable to get Participant Info from Graph SDK

Describe the issue
There is an intermittent issue observed where the Graph SDK returns null participants when the PSI bot joins a call with one or any x number of participants already present. It appears that the Graph SDK is intermittently failing to fetch participants, resulting in null values being returned. This behavior needs investigation and resolution to ensure consistent functionality.

Code Snippet
This code snippet is from CallHandler class which triggers on ParticipantUpdate:

if (participantDetails != null)
{
    json = updateParticipant(this.BotMediaStream.participants, participant, added,participantDetails.DisplayName);
}
else if (participant.Resource.Info.Identity.AdditionalData?.Count > 0)
{
    if (CheckParticipantIsUsable(participant))
    {
        json = updateParticipant(this.BotMediaStream.participants, participant, added);
    }
}

Expected behavior
The expected behavior is consistent retrieval of accurate participant information by the Graph SDK. Currently, the SDK intermittently fails to provide accurate participant details, requiring investigation and resolution for consistent functionality.

Graph SDK Version:
Microsoft.Graph V 5.44

Start at the CallHandler ParticipantUpdate path shown in the issue and inspect how Graph SDK v5.44 participant data flows through participantDetails and participant.Resource.Info.Identity. Reproduce a PSI bot joining calls with existing participants, then trace intermittent null values. Done means participant information is retrieved consistently in these cases.