Inconsistent Boolean Cell format in Output Spreadsheet

This issue is redirected from a downstream issue.

Minimal reproducible example

from openpyxl import Workbook

book = Workbook()
wks = book.create_sheet()
startrow, startcol = 0, 0
for cell in range(64):
    xcell = wks.cell(
        row=startrow + cell + 1, column=startcol + 1
    )
    xcell.value = True
book.save("test_direct.xlsx")

Issue Description

An Excel workbook test_direct.xlsx with two sheets should be created. The column A of Sheet1 should contain 64 boolean values of TRUE(). Cell values should also be 'boolean value'. However, the cell format after row 32 in 'Sheet1' is 'general number'.