[NullReferenceException] ResetPageOffset

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EPPlus 4.5.3.2
dotnetcore 3.1

Upon calling DeleteRow(6150), ResetPageOffset is giving a nullpointer.
pagePos = 2
rows=1
page1.offset was 4000+
column._pages holds 3 actual pages (index 0, 1, 2), but it's attempting to compare to index 3 which is null.

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Persists after updatnig to 4.5.3.3