Commented Unassigned: Calling Montage returns null only the first time [1364]

Hello,

I'm using Q8-Any CPU, v7.0.0.19. When I call Montage in a MagickImageCollection, it always return null the first time. If I make the call again with the same parameters, it works fine.

Hopefully that should be fixed. Thank you

Comments: I am unable to continue to investigate this without further information. Can you please provide me with a small C# test project that demonstrates the issue. Otherwise I will have to close this issue.