TYPO3 Core

I upgraded from TYPO3 7 to 8 using my own templates/partials/layouts for fluid_styled_content. In v7 the Default.html layout file was not present so I did not have that file in my defined folder. But instead of using the default file shipped with fluid_styled content, the Default.html layout file defined for the page layout was used which should be a bug.
I defined the paths like:
for fsc: constants: styles.templates.layoutRootPath = assets/layouts/content/
for page: setup: page.10.layoutRootPath = assets/layouts/

After copying the default Default.html layout to assets/layouts/content/ everything worked again. Should I better use assets/layouts/page/ for the page layout files?