Freezing does not work in Excel file with around 15 sheets

[Rengervn]

Expected Behavior

I fill an excel file in a loop over around 15 sheets with data. At the end of each sheet, I add a freezePane command.
freezePane(wb, sn, firstActiveRow = 4, firstActiveCol = 7)
and after the loop save it.
I expect the sheets are frozen at 4,7

Actual Behavior

No freezing takes place

Steps to Reproduce the Problem

(please attach an example xlsx file if possible)

Just run the following code
wb <- loadWorkbook(file = "temp.xlsx")
sectors <- getSheetNames(file = "temp.xlsx")
for (sn in sectors) {
freezePane(wb, sn, firstActiveRow = 4, firstActiveCol = 7)
}
saveWorkbook(wb, file = "temp.xlsx", overwrite = T)

Cheers
Renger

sessionInfo()

• Version of openxlsx: 4.2.5.2
• Version of R: 4.0.4
  temp.xlsx

[Rengervn]

With smaller excel files, freeze works fine.