In either the Info panel or the Document Information Panel at the base of the screen, i have Document Sizes displayed in Megabytes. When I work on the document by adding layers/masks or whatever, the document size does not update. I can only get it to do so by either selecting a second document and then reselecting the original or by selecting a different option in the Document Information Panel (like Document Profile/Document Dimensions/.... Layer Count) and then reverting to Document Sizes.
Is this a bug, a known issue? Is there a workaround to get the size recalculated without doing the above?