Sent radar #32674764
Update from Apple Radar:
"Thank you for your feedback. Engineering has determined that this issue behaves as intended."
Another update from the Radar:
"This issue behaves as intended based on the following:
There is not any documentation of the new metrics.
You can use fixed spaces to achieve the new layout.
Search received a new appearance in iOS 11.
Please update your bug report to let us know if this is still an issue for you."