Events File App - Can't delete files.

Using a regular user account, I've uploaded 3 files to an event using the File App.

Now I'm trying to delete them.

But looks like a bug... they won't delete. (tried using the 'Delete Selected' which seems ineffective and also the individual delete buttons which don't seem to work either)

I'm giving you the user account info (please don't contact that user though! I'm experimenting using his account). I'm happy for you to delete the 3 files in question... but hopefully (?!) you'll find the same issue and be able to squash whatever bug this is.

Thanks.