🐞"-" subscription group doesn't work anymore

Concise Description

On subscriptions page, a button appears above for the subscription groups. You can then click and select "tick" or "-" to only, or don't, show that group. This doesn't work anymore, you now always see "all" subscriptions. I only use one group for "News", the rest are ungrouped. You can see in the image that "FRANCE 24 English" is in the News group, but still shown when "- News" is set.

Browser/s

Firefox

Other Browser:

No response

'Steps to reproduce' - Which of our features is required for the bug to happen?

Showing subscriptions as in the image

Since when?

Last day or so

Does the bug still happen when you log out of YouTube?

Yes

..No? Then please paste your yt.config_.EXPERIMENT_FLAGS. Twice (With the error & Without)

No response

Are any errors or related log-messages shown in the Browser-Console? (F12)

No response

Tested as the only active extension? (incognito mode or another browser users):

None

Expected preferred behavior:

No response

ImprovedTube Version

No response

Your Settings (From the Extension's ⋮-Hamburger menu > Settings > Backup & reset > Export settings)

No response

Your YouTube-Document

No response

OS / Device:

No response

Start by reproducing the issue on the subscriptions page in Firefox, with the “-” option selected for the News group. Trace the subscription-group filtering behavior from that page; done means grouped subscriptions are hidden when “- News” is selected while ungrouped subscriptions remain visible.