[Python] Python, tkinter, tksheet self.sheet.set_row_heights() not working

I use tksheet and whenever a cell is edited, I want to "reset" the column width and height. The height however is not set acordingly while the width is.

class Orderbuch(tk.Tk):

def set_header(self):
self.sheet1.headers(col_headers)
self.sheet1.set_column_widths(col_headers_widths)
self.sheet1.set_row_heights(26)

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