Hang while using "check permissions" feature

[Yvand]

In some scenario, AzureCP hangs while using "check permissions" feature.
So far I could reproduce it only in SharePoint 2019 in a multi-server farm, in the w3wp of a site while using "check permissions" feature.

[Yvand]

In AzureCP.GetGroupMembershipFromAzureADAsync(), await on tasks somehow causes the hang:

IGraphServiceUsersCollectionPage userResult = await tenant.GraphService.Users.Request().Filter(filter).GetAsync().ConfigureAwait(false);

This is somehow caused by the way ASP.NET runs async tasks.
Workaround found: instead of awaiting on the async task directly, run it in a parent task, and await on the parent task:

IGraphServiceUsersCollectionPage userResult = await Task.Run(() => tenant.GraphService.Users.Request().Filter(filter).GetAsync()).ConfigureAwait(false);