I've updated to drupal core 8.3.0 (with the new layout discovery module) and the latest version of display suite.
Something strange I notice is that the site itself shows the node and user display view correctly (as in: before the upgrade), but when I look at the manage display page the fields are scrambled. The chosen layout (e.g. 3 column layout) is still active, but all/most fields are for example listed under the header region.
When I start moving fields, it happens that they suddenly reset or move spontaneously before I've saved.
Clearing the cache changes nothing about this situation.
Is there a way to recover the original region settings for my fields in the manage display pages?