https://issues.apache.org/bugzilla/show_bug.cgi?id=52067
--- Comment #2 from Maciej <maciej.szatkow...@gmail.com> --- I think I pinned down this bug. Reason is new series are cloned into sheet records one index too late. Lines 1208~1209: /* next index in the records list where the new series can be inserted */ idx = endSeriesRecordIdx + 1; just change idx to: idx = endSeriesRecordIdx; Works for me. Unfortunately I am not able to provide test case covering this - bug shows only after opening file in Excel. -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@poi.apache.org For additional commands, e-mail: dev-h...@poi.apache.org