Vaadin 25: Horizontal orientation breaks

[paodb]

Describe the bug

When changing the orientation to horizontal or horizontal reverse, the ui breaks:

Expected behavior

Component should display in horizontal orientation without issues.

Minimal reproducible example

Change orientation to horizontal in this example https://addonsv25-staging.flowingcode.com/twincolgrid/orientation

Add-on Version

3.2.0-SNAPSHOT

Vaadin Version

25.0.0-beta7

Additional information

N/A