Sharing calendar with groups: not working (it's working with a user)

[chatlumo]

Steps to reproduce

1. I share a calendar with a user, everything goes as expected.
2. I share a calendar with a group, if I refresh the calendar page, no share has been added to the group, as if there was no recorded.
3. Having done some tests, I realize that if the group name is in one word without a space, the permission is well recorded. If there is a space in the name, like "Bureau National", it doesn't persist and the sharing is not done.

Do you have any idea why?

Expected behaviour

A calendar shared with the selected group

Actual behaviour

The group is not persistent

Calendar app

Calendar app version: 2.2.0

Client configuration

Browser: Chrome 89.0.4389.90

Server configuration

PHP version: 7.2.34

Nextcloud Version: Nextcloud 20.0.8

[tcitworld]

Duplicate from nextcloud/server#17610 nextcloud/server#25165