Inner Blocks reset to block template in the backend.

[Sephsekla]

Gutenberg 3.6.2

Describe the bug
I'm working on a plugin adding Gutenberg blocks with child blocks inside.

The container block has a block template. This works correctly on creating a post, and displays correctly in the frontend.

However editing an existing post resets the block content to the template.

When the block template code is removed everything works as expected.

To Reproduce

Block registration code attached below.

(Hopefully not just an obvious mistake in my code.)

example.txt

Expected behavior
The content should be loaded as expected in the backend.

[chrisvanpatten]

Thanks for the report @Sephsekla! We're tracking this in issue #8109. As this is a duplicate I'll close it here but definitely recommend following over at #8109, and we can reopen later if necessary too.

Cheers!