Column cannot be deleted if page_action='custom' is used

[christianwengert]

When using the code example from the docs (https://dash.plot.ly/datatable/editable) deleting columns works perfectly
(BTW: the column attribute in the example editable_name became renamable)

But when I set the datatable attribute page_action='custom' for backend paging. The delete buttons do not appear anymore in the column header, so I cannot delete a column.

using latest libraries, especially dash-table 1.0.2