Cannot hide columns with merged cells
I have 3 columns with 3 merged cells in some rows (including header row). When I select the columns in popup drop menu 'Hide Selected Columns' item is grey and I cannot click on it. When I export into Excel file, and open it in Excel and select the columns in the similar popup drop menu, I see 'Hide' item which is not grey. I click on it and columns disappear. Unfortunately, opening in Numbers the saved Excel file unhides the columns again.
It is not convenient to switch to Excel. 😢
Is there some way in Numbers to hide columns with merged cells?