A user on dewiki has reported this bug; I only have the iOS app and cannot reproduce the issue there, thus I assume it is an Android-only problem. Apparently, some infoboxes on dewiki are not only collapsed, but completely invisible in the app. While the infobox [[https://de.wikipedia.org/wiki/Ring_Ring_(Lied) | here]] is collapsed, the one [[https://de.wikipedia.org/wiki/Ring_Ring | here]] vanishes completely. The difference between the two is that the former is a table, the latter a table within a div (which is necessary as workaround for T18700). What happened?
UPDATE: Now I experience the same bug in the iOS app as well! And I discovered a trigger of this bug on enwiki: whenever infoboxes are used within the [[ https://en.wikipedia.org/wiki/Template:Stack_begin | Stack begin ]] / [[ https://en.wikipedia.org/wiki/Template:Stack_end | Stack end ]] templates, they will not be visible in the apps anymore. See for example [[ https://en.wikipedia.org/wiki/Huzhou | this article ]].