Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
The layout of a dossier breaks when quickly switching between pages with the arrow keys in Library 2019. The issue exists when the dossier contains multiple pages and users utilize the arrow keys to switch pages while the current page is still rendering.
For example, this is the original layout of a sample dossier:

But when switching pages with the arrow keys, this defect breaks the format:

This is a known defect for Strategy Library 2019.
This issue has been addressed in Strategy Library 2019 Update 2+. The Strategy Internal Reference Number is DE131916.
KB483292