πΊπΈUnited States mbnsorg
This is an older thread, but just noting we ran into the same issues described here.
On D10 (v10.1.6), we attempted exporting/importing very basic site configuration from one dev site to another, but the workarounds described did not work. Notably, once shortcut_set (or shortcut per #71) is deleted, that causes failures in drupal core/shortcut where a "shortcut_set" object is expected to be not-null in a variety of places.
We abandoned the config export/import and used a db dump instead, which was fine for our short term need, but we were surprised that a simple configuration share didn't work.