D-tools seems to redefine blocks when system integrator opens or placing new block instances.
I have blocks assigned to Packages (single shape option).
These blocks have attributes & hatches.
When dragging packages from SI to Autocad, geometry draw order within the block is not preserved. So hatches will draw after text and other geometry. If I edit the block and fix this, the next time I drag in a package the block reverts back to the incorrect display.
Any attribute text gets cleared (probably the default attribute value).
Even after saving the drawing, once it is opened using SI (not directly through Autocad)
The blocks get redefined.