‘NestedHeader’ doesn’t show up on latest Chrome browser.
With handsontable 7.1.1 it doesn’t.
But with 7.1.0 it does!
So i changed handsontable with version 7.1.0 on my service site for workaround
until 7.1.1 fixed, (or maybe chrome browser fixed…)
That demo page is authorized area so you need to join membership in Korean, which i’m afraid you hardly can do…
Here are more captures
i found that this visibility option can toggle the headers’ show-up with version 7.1.1
but with version 7.1.0,
the headers are always shown whether this visibility option is on or off