In the app, go to Mobile 34 > MM Dev Testing > Resource: URL > "Here's a page to test URL download" shows the following error: Error downloading files. Some files might be missing. I think it is normal because there isn't any thing to download. Be aware that the error is not show in the web.

It is still happening (26/11/18 3.5.2 version 3520 compiled 23/11/18 2:24PM +1:00. (In Android Mobile and Tablet, as well as iPhone)

Issue https://tracker.moodle.org/browse/MOBILE-2539 that "inspired" this one