Both Android and iOS apps have a feature to edit the description of an Wikipedia article. Technically, it will modify the "Description" field of the corresponding Wikidata item in the language user set. The problem here is if such edit triggered an edit filter at Wikidata with action set to "warning" or "disallow" ("block" not tested, but I thought should have similar behavior), the user will not see the message provided by the edit filter; instead, they could only see a notice said like "Failed to save your edit":

(An example Android screenshot, with version 2.7.50415-beta-2022-07-25)

I thought the warning message from abusefilter need to be given to mobile app users, as it would be helpful for them to know why their edit (to the article description) failed to be saved.