Steps to Reproduce

1. switch to Sheet2
2. switch to Sheet1
3. repeat step1 and 2 for 2 more times

Current Result

when switching to the 1st tab at the 3rd times:

zss.wpd:24557 Uncaught TypeError: Cannot read properties of undefined (reading 'i')
at init.$init (zss.wpd:24557:21)
at new init (zk.wpd:9734:18)
at init.initHeaders_ (zss.wpd:27613:13)
at init.$init (zss.wpd:27185:23)
at new init (zk.wpd:9734:18)
at init.doSheetSelected (zss.wpd:37487:20)
at init.sheetId (zss.wpd:12926:15)
at init.setSheetId (zk.wpd:9781:15)
at init.doSelectSheet (zss.wpd:36891:10)
at init._onSelectSheet (zss.wpd:36813:8)

Expected Result

no error

Debug Information

• caused by KEIKAI-572. 5.9.0 doesn't have this bug.
• the focus is at B100 on the Sheet1. If you put the focus inside the visible range, the bug doesn't happen.