Also, I printed the length of content in sidebar having Book navigation menu,...

Contribution Date
Technology
Drupal
Contribution Project
Drupal core
Contribution Details

Also, I printed the length of content in sidebar having Book navigation menu, {{ content|length }} and the output is 215. It seems to be an issue with the block itself.

Issue Status
Needs work
Contribution Author
gauravmahlawat
Contribution Issue Link
Olivero sidebar region produces whitespace output that the page template considers is an existing sidebar
Contribution Link
https://www.drupal.org/project/drupal/issues/3421433#comment-15442629
Files count
0
Patches count
0