browsing arrows in viewer doesn't work in all cases

Description

With PDF everything is fine, but if viewer shows mets you can't browse using arrows. Both buttons are disabled:

https://publikationsserver.tu-braunschweig.de/receive/dbbs_mods_00000169

Environment

None

Assignee

Sebastian Hofmann

Reporter

Kathleen Neumann

Labels

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URL

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External issue ID

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Components

Fix versions

Affects versions

Priority

Medium
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