Then I’d make sure I restarted the computer. (Also see if any updates were installed).

I’d also disconnect peripheral monitors.

After that I’m not sure… I’d have to look closer. Also try completely new excel book/file.

This should help isolate machine/environment from the data itself. If another machine shows it fine… then there is something wrong with your machine. But if you can make it work on another machine, it’s likely something with the data.