Bug? calc cache > 3 sort terms?

Libre office Calc has a nice feature where it remembers my sort settings on a group of columns that I sort regularly.

But instead of sorting by 3 columns, now I sort by 4 columns. The problem is it only remembers the first 3 and I have to add the 4th term manually again.

I think its a bug.

I can reproduce the issue.
Please report this issue as a bug including as much detail as possible and post a link to bug report back here in the format “fdo#123456”.
Then I will confirm and set up it as new.