interaction betw covered range and frozen cols

Consider a 10 column grid with the frozen column count set to 5 and with a covered range defined on angeInfo.cells (1,3,1,9)

Put a long enough string in the covered range so that it nearly fills the covered range, set the horizontal alignment to Left and set HScrollBehavior to Enabled

When I do this and scroll sideways - the text in the covered range gets mangled at the border between frozen and non-frozen columns? Why?




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