Wrong Canvas size in Scheduled Report

When I schedule a report in looker studio to be sent by email, it used to match the layout of the dashboard. However, the email report now appears with an A4-sized canvas, while the dashboard layout remains unchanged. As a result, the graphs are cut off on the right and bottom. How can I adjust the email report to restore the original layout and prevent this issue? I didn't make any changes in the dashboard.

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