V9 elemental block edit nav tabs

I have a block edit interface utilizing multiple levels of nav tabs. This package installs v8-v9 and I’m doing a concrete version check to apply the proper boostrap classes. In v8 elemental and v9 atomik my nav tabs work perfectly. For some reason in v9 elemental my nav tabs break, where the first tab in each level’s contents are always visible. Anyone else experiencing this? Possible solutions?

Edit: Confirm this applies to multiple blocks and not just that one in particular.

Edit Edit: Happens with core blocks as well. Add a page list and the preview tab only appears below the first tabs contents…

Getting same results testing with 9.0.2 & 9.1.0rc…
Will leave here momentarily and report on github pending feedback…