Cascade type files switch to default layout when changed

[frank-segui]

What version of Hugo are you using (hugo version)?

$ hugo version
Hugo Static Site Generator v0.59.1-D5DAB232/extended darwin/amd64 BuildDate: 2019-10-31T15:27:09Z

Does this issue reproduce with the latest release?

Yes. Using extended version.

Details

I am using multiple content folders with cascade.type set. When I make a change in the markdown of one of the files inheriting the type, it switches to the default layout. Then I have to restart hugo for it to pick the the correct layout.

This does not happen for files at the same level of the cascade.type _index.md, just for all files on nested folders under the _index.md with the cascade.type.

I have a minimal example here: https://github.com/frank-segui/hugo-cascading-issue

on hugo serve, changing a file under content/type/dir will change all files in that dir from Another type layout to Default layout.

What I expected

Making a change in a file keeps the layout inherited from its nearest cascade.type.