Media Viewer ignores a <br /> markup in the caption of an image in a confusing way. Two separate words are joined to one nonsensical word.
Example:
https://de.wikipedia.org/wiki/Kaimane#/media/File:U49.jpg
Junger [[Krokodilkaiman]]<br />gesichtet in [[Tortuguero]] (Costa Rica)
becomes:
Junger Krokodilkaimangesichtet in Tortuguero (Costa Rica)
with "Krokodilkaimangesichtet" being a nonsensical word.
I suggest, it should say:
Junger Krokodilkaiman — gesichtet in Tortuguero (Costa Rica)
with a dash and two spaces as the output, where there is a <br /> in the source code for the caption of an image.