I don’t know if anyone else have been having the same problem as I with grouping cells, but I’ve grouped 3 columns to the left (month, then for every month there are 4 weeks, and for every week there are the 7 days of the week) and now every time I create a new month and try to add any information to a cell (for example add a text in a cell for the first week on Monday) the rest of the groups disappear! Even if I try to click on every row so that new cells appear, I have no idea how to get around this, the only way I found was to add a new day of the week and then delete, but doing this every time is tiresome
Do have a look at this demo and let me know if that solves your problem.
You can also copy the doc below that I created , try to perform what you need.
Hope this is helpful for you.
I’ll take a look later when I have more time and give you feedback, thanks!
I have done this already, the problem is when I try to create a new month after all that grouping