All of this has happened before. All of this will happen again. Maybe The Excel copy and paste bug is back, which means Microsoft is making a second round of fixes. The bug first appeared in the September update and manifested in multiple versions of Excel as a silent failure of the paste operation. Users copied content and attempted to paste it, but the destination cell was unchanged no matter how hard they mashed the Ctrl+V keys. Microsoft fixed it in mid September. But it made a comeback in...
