Change 90287 had a related patch set uploaded by Arlolra:
Don't emit foster box in transclusion

https://gerrit.wikimedia.org/r/90287

The reason for the first crasher is the following template,

{{навигационная полоса

<table></table> }} What's happening is similar to the reason for dom.handleUnbalancedTables.js The <td> containing the inner table as content is built up in a few tokens, forcing the tree builder to close the table right before the inner table, stealing its fosterbox. That foster box is a child of <div> and has no siblings, hence the original error. I think the thing to do (as in the patch) is just not emit the foster box for the inner table. We aren't really even using it.

Change 90287 merged by jenkins-bot:
Don't emit foster box in transclusion

https://gerrit.wikimedia.org/r/90287

Change 90436 had a related patch set uploaded by Arlolra:
Only copy data-parsoid attr to shadow meta from el

https://gerrit.wikimedia.org/r/90436

Change 90436 merged by jenkins-bot:
Only copy data-parsoid attribute from element to shadow meta

https://gerrit.wikimedia.org/r/90436