InviteAsync does not work from inbound call

I am trying to escalate an inbound peer-to-peer call to a multiparty call
Acording to https://developer.microsoft.com/en-us/graph/docs/api-reference/beta/resources/calls-api-overview, “Your bot can initiate escalation by inviting others, provided your bot has the initiate-group-call permission”.
I do a call.Participants.InviteAsync to another user in my tenant.
When I Invite the agent, after about 1 second then the call is reported removed. The InviteAsync task is still running another 25 seconds before it throws a TimeoutException.
No error other than the Exception.
Is this the way you should do when escalating an inbound call to a multiparty or do you have to manage a meeting/conference by yourself in this situation?
How do you delete/hangup an individual participant from the SDK?

Start with the reported InviteAsync call during an inbound peer-to-peer call and reproduce the escalation to another tenant user. Read the linked Calls API overview alongside the observed call removal and TimeoutException, then clarify whether inbound escalation is supported and how an individual participant should be disconnected. Done means the supported flow and failure behavior are documented or reproduced with a clear resolution.