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 here is collapsed, the one 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 Stack begin / Stack end templates, they will not be visible in the apps anymore. See for example this article.