id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
30270	.all() for related manager always returns empty list	Victor Porton	nobody	"`.all()` for related manager always (at least in my case) returns empty list. This seems an big error or at least a wrongly documented or undocumented behavior.

It is demonstrated by the attached small test project.

The most relevant code fragment is:
```
        holder = Holder.objects.get(pk=1)
        self.assertEqual(holder.items.all().count(), 2, 'Correct objects count')
```

Django 2.1.7"	Bug	closed	Database layer (models, ORM)	2.1	Release blocker	invalid			Unreviewed	0	0	0	0	0	0