Error when inviting the bot to a meeting: Server Internal Error. DiagCode: 500#7117.@

We have created a solution that invites the Microsoft Teams media bot to an online teams meeting. Unfortunately the bot does not always seem to join the call. 

In these cases;
We only receive the "Establishing..." callback, but then the call is never actually transfered to "Established". After waiting for about 60 seconds. We receive the "Terminated" signal, without the call ever reaching the "established" state.

Along with this terminated callback, we also receive the following error code (for which we can not find any documentation..)

Server Internal Error. DiagCode: 500#7117.@

The steps and conditions of inviting the bot are always the same.
1. Create New meeting
2. Invite bot to meeting
3. 50% (sometimes lower, sometimes higher) chance bot will join

A workaround I found was, inviting the bot multiple times. Which sometimes work, but the bot is then kicked subsequently when the "Terminated" callback is sent our way.

await this.Client.Calls().AddAsync(joinParams).ConfigureAwait(false);

This is the code to trigger the invitation of the bot, as per the microsoft sample. (https://microsoftgraph.github.io/microsoft-graph-comms-samples/docs/calls/Microsoft.Graph.Communications.Calls.CallCollectionExtensions.html)

Can someone please shed some light on the meaning of this error code? I have not found any patterns in its occurrence and our calls to the service do not change. The only difference likely being a different meetingId. 

Server Internal Error. DiagCode: 500#7117.@