2. Try to select columns B to D using mouse
3. Click on column B, keeping mouse clicked, move your mouse towards C then D
4. It does not allow to select B,C,D where as it is possible in Excel.
It is serious issue for me as I could not proceed with Hide/Unhide columns and some other features depend on multiple columns selection
Note: if we add a blank row at first position then it works well, seems like first with merged columns is creating problem.