After scrolling down to bottom of sheet quickly, select a row with data.
Then, insert a row on such selected row and remove any row before the row with data.
The last row will have the same data as selected row with data.
But, the model is correct. It should be a client-side issue.

reproduce steps:

1. open any file and set its max. rows (e.g 150)
2. scroll to bottom of sheet quickly (make a jump fetching)
3. input some text into a row (e.g on A140)
   • Or just select a row with data
4. select such row and insert one row by right-click (e.g insert on row 140)
5. delete any row before the row with data (e.g delete row 140)
   • the last row's text will be same as the row with data