Federated inherited circle members can't access shared resources from parent circle

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Inherited members from federated remote team doesn't see shared resources despite mount entries being created.

Steps to reproduce

1. setup federation environment with two Nextcloud instances (e.g. nc_1 + nc_2)
2. on nc_1 as bob:

• create test_team and check "Allow federated members"
• add john from nc_2 (john@nc_2)

3. on nc_2 as john:

• create remote_team
• add alice

4. on nc_1, add remote_team to test_team:

occ circles:members:add --type 16 <test-team-id> <remote-team-id>@nc_2

5. on nc_1, as bob

• create test_folder and share with test_team

6. on nc_2 as alice

• navigate to files > "All files"
• notice how test_folder does not appear there, which is incorrect
• note: entries are generated on oc_circles_mount and oc_circles_mountpoint

Expected behaviour

when a remote circle (from another instance) is added as a member of a circle, members inherited from that remote circle should be able to access resources shared with the parent circle.

Actual behaviour

the resource does not appear for the inherited member (alice), even though entries are generated on oc_circles_mount and oc_circles_mountpoint.

Server configuration

Web server: Apache/Nginx

Database: MySQL/Maria/SQLite/PostgreSQL

PHP version: 8.5/8.4/8.3

Nextcloud version: Nextcloud 36.0.0 dev

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

Browser

Browser name: Firefox/Chrome/Safari/…

Browser version: 124/125/…

Operating system: Windows/Ubuntu/Mac/…

Insert your browser log here, this could for example include:
a) The javascript console log
b) The network log
c) ...

Start by reproducing the two-instance federation setup and the occ circles:members:add --type 16 entry point. Inspect the generated oc_circles_mount and oc_circles_mountpoint entries while checking why the inherited member cannot see test_folder. Done means alice can access the resource shared with test_team from the parent instance.