Hi Support,
Current Aspose.Diagram v.25.11.0 contains issues that break shapes grouping after a simple Open/Save diagram.
I believe this was broken by a fix to the following issue:
Steps to reproduce:
Diagram exam…...file with the previous stable release (e.g., v25.10.x). If the grouping...workaround – Until a fix is released, you can use an earlier version...