Copying original issue description:

Steps to reproduce the issue

Create a menu
Add a menu item of menu item type "Menu Heading"
Add a submenu item of menu item type "Individual Article"

Create a breadcrumb module for this menu and navigate to the submenu item.

Expected result

The breadcrumb module should show
Home > Menu Item > Sub Menu Item

Actual result

The breadcrumb module shows
Home > Menu Item

System information (as much as possible)

Not relevant

Looks like the issue came from the recent #7613 PR which re-worked the breadcrumbs to include microdata.

@test tested and now the Menu Heading type shows back up in the breadcrumb trail as expected.

Merging on reivew with the test

I manually fixed this once before. Just updated to 3.4.8 and its still there? How long until this gets pushed to stable?

It is merged for 3.5.0 as you can see from the milestone, meanwhile you can copy your fixed version to the template and create an override

I know how to fix it as I've done it before. My question was what makes this 3.5 and not a bugfix that should have made it into 3.4.x a couple revisions ago. When I update, bugs should be fixed, not re-added! Nor should I have to go through a complicated overlay procedure to stop new releases from re adding bugs that were fixed months ago!

This is clearly not a new feature nor anything that would break compatibility with existing modules or cause new issues. It's a typo, exactly the sort of thing that new releases are supposed to fix. Bug has been here ... 6 months?

Sure. It's my fault for not using an overlay to fix it. That's it!

can't say why it wasn't merged for 3.4.5 from the timeline it should have be merged/included, after that we had only security releases and we decided to merge only the security fixes