In Admin - Table Settings - Reports - table_reports, the Group and Subgroup checkboxes do not hide the respective column in the saved reports page. The Group and Subgroup columns can be hidden from the saved reports page by using the Column Config option there, but they need to be able to be hidden from the Table Settings function.
It seems to work on the first tab 'All', not the others. Is that what you are noticing as well?
On the ALL tab, neither column is hidden by table settings. On the group tabs, group is hidden automatically, but subgroup still shows. I can verify that groups and subgroups columns were being hidden correctly on the All tab on 20.05, that changed with 20.11. Subgroups on the group tabs were not being hidden correctly starting with at least 20.05. Verified the current behavior (or lack thereof) in 20.11, 21.05, and 21.11
What I see is that it's off by one column on the other tabs: * Hide sub group in the table configuration * All tab: Sub groub is correctly hidden * All other tabs: Group is hidden instead The number of columns appears the same, but I think there must be some difference between the tables? Group is before sub group in the list of columns.