We often insert dwg in our sketches and up to know never had an issue with the process. The blocks are linked to the cad file to adapt to changes. But today big surprise when opening a part, the sketch is under defined so I investigate. One of the linked cad block is invisible even if listed in the feature tree. The block is okay when opened for editing. I tried to delete and reinsert but it always comes in not visible. Other files that are opened containing this block show the same problem. So I tried to insert the block in a completely new part and it works fine.
Why is this happening and how can I fix this? Sorry but I can't attach company file to this post and since I was not able to replicate the issue I hope you can understand what I'm explaining.