Include and ThenInclude sub properties causes System.InvalidOperationException: Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct

[harsha89vyas]

The following include sequence causes the System.InvalidOperationException: Operations that change non-concurrent collections must have exclusive access. A concurrent update was performed on this collection and corrupted its state. The collection's state is no longer correct
.Include(x => x.A)
.ThenInclude(x => x.B)
.ThenInclude(x => x.C)
.Include(x => x.A)
.ThenInclude(x => x.B)
.ThenInclude(x => x.D)
.ThenInclude(x => x.E)
.Include(x => x.A)
.ThenInclude(x => x.B)
.ThenInclude(x => x.D)
.ThenInclude(a => a.F)
.Include(x => x.A)
.ThenInclude(x => x.B)
.ThenInclude(x => x.D)
.ThenInclude(a => a.G)
.Include(x => x.A)
.ThenInclude(x => x.B)
.ThenInclude(x => x.D)
.ThenInclude(a => a.C)
.ThenInclude(a => a.H)

This happens due to the fix dotnet/coreclr#16991 applied due to issue https://github.com/dotnet/corefx/issues/28123

[benaadams]

Added an issue to corefx so its easier to find information about this exception in search dotnet/corefx#31186

[RussKeldorph]

This issue was moved to dotnet/efcore#12926