Creating a calculation group in Tabular Editor disables the format dropdown in Measure Tools

Is this also the reason why none of the columns summarized anymore? All numeric columns are missing the sigmas and I can't even choose to sum those with down arrow in values section. All format options are availabe in ribbon but summarization just won't happened.

In a workaround I can use older version of the file, creates the visual with sums there and copying the visual into new file. The sums remains and everything works fine. And also, it is not very good practise to use columns straight so I normally use measures everywhere so the problem is not so huge. But in debugging purposes it is very handy to have the summarizing possibility and because of that, I really like if this will be fixed also.