Strange effect in second attempt to edit sketch in assembly

Problem is reproduced in following steps:
1.Open/create any assembly (even with 5-6 parts).
2.Open a part from the assembly in separate window.Don't close the
assembly window.
3.Edit/create sketch.All sketch functions work normally.Save and close
the part window.
4.From assembly window open again the same part in separate window.
5.Edit the sketch from step 3 or create new.
6.Try to create any sketch entity.The troubles appear immediately: no
preview, incorrect visualization, jump in CPU usage

That effect exists on all our PCs (4) with different operating
systems, different display adapters and different versions of the
display driver(either SolidWorks certified or not).
Is this a bug, or???

Regards,
Anton Nanchev

 

Same Prob on my system... think its a bug...I have tried different settings
and still the same effect...Really ties up my system. I end up closing the
assembly and then do mods then reopen assy.

 

It's a bug. I submitted it a few weeks ago. SW is aware.

Mike Wilson