Multiple "table grouping" with "group aggregate" crashes the table view

[Mae]

Hi, we have found what seems to be a bug in table grouping.

We have two table views (although we have verified that it happens also in deck views) with multiple grouping. First we group by a column named Centro (center), then by a virtual column made up by year and month ("year-month") and then by "_RowNumber" to separate records from grouping.

Adding to the multiple grouping we have a group aggregate: COUNT.

So far it was working fine and displaying the number of records at each grouping level, but now the views crash with this error in console:

And only shows the table if we reduce the groupping level to one or we remove the the group aggregate from the view. The app doesn't even navigate to tables that have this problem. This is what the table looks like now:

And this is what it looks like when we remove the group aggregate (as it should be, but without showing the count):

Is there any solution to this?

Thanks in advance.