Upfront presets in responsive mode not assigned properly

I am having a problem with my presets. Here are the steps I follow:

- add a text module to the site
- create and configure preset for it and save (so far so good)
- switch to "Responsive mode"
- switch to "tablet" breakpoint, create and configure preset for that module and save
- do the same for "mobile" breakpoint

After saving both, I get reverted to the one that's been set as the "default" (desktop) breakpoint/mode.