I hope some one has a solution to this problem. I'm working in a max sized view port at 1:2,500 scale (View and Annotation). I edit a block with block editor and when I return to the drawing all my annotative objects are invisible. Upon further investigation I find that my Annotation scale has changed to 1:1000! Even though the view port is locked!! This is happening quite frequently in many different drawings, but not all of them, Very frustrating when I need to return to paper space, unlock the viewport, correct the scale, re-lock the view port and return to model space every time!! Has anybody found a solution to this or has anyone else encoutered this error.