Opening older drawings in 2020 and BOM and annotations disappear when hitting save. I have to do an advanced rebuild to get them back. I am seeing this on more than one computer with similar hardware. Any ideas? and yes graphic card drivers are up to date. I think it only happens when older drawings are updated to 2020 not when creating new drawings.
I seem to remember a few other people seeing the same problem. I think it had something do to with fonts. Try changing them to a different one and see if that helps.