Ngx-datatable: Row grouping with Vertical scroll

[ChanBen]

I'm submitting a ... (check one with "x")

[ V] bug report => search github for a similar issue or PR before submitting
[ ] feature request
[ ] support request => Please do not submit support request here, post on Stackoverflow or Gitter

Current behavior

I know that there is already an open issue about it
but nothing is updated there for a long time, and this is realy urgent to me.
when i set vertical scroll to true and initialize the groupRowsBy parameter -the page just collapses.
i have lots of data, so i cannot give up on this virtual scroll.
and i need this row grouping as well.
any idea would be very appreciated!

Expected behavior

I expect the row grouping to work well with the vertical scroll

Reproduction of the problem

just took the demo of the 10k lines and add the "groupRowsBy" parameter.

• Table version:
  last version

• Angular version: 5

• Browser: [all ]
  

• Language: [TypeScript]

[ghost]

same issue.

[MirGold]

me too

[karljv]

Please fix this!