Viewing mentions at group's activity page is broken

[Moin]

When you click on Mentions at a group’s activity page like g/community-moderators/activity, it doesn’t work:

The experience is worse when you try to open the mentions in a new tab.

[ondrej]

I can repro this too.

[nat (Natalie T)]

Thanks for the report, we’ll prioritise fixing this.

[zogstrip]

Having a quick look

[Arkshine]

It looks like a side effect of

https://github.com/discourse/discourse/commit/1deeff2336a3d9180ec6276a8fd5b399ec6165c8

The output format in the group’s controller changed for /posts, but not for /mentions.

[zogstrip]

Thanks @Moin for the report
Thanks @Arkshine for the link to the related change

This will be fixed by

https://github.com/discourse/discourse/pull/27066

[Moin]

I have just tried this, and it appears that only the first 20 results are loaded. When scrolling further, the same 20 results seem to be repeated.

[zogstrip]

Nice catch @Moin

The client is using before instead of before_post_id to do the infinite loading

This will be fixed by

https://github.com/discourse/discourse/pull/27070