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Previously, we pinpointed as a cause of the bug, although noting it affects other apps as well. On Twitter, it was found that their website association file, used by the system for the universal links feature introduced with iOS 9, was many megabytes, grossly oversized. This would essentially overload the daemon that had to parse these files, causing the crashing. The app has since corrected its payload file to be a far more reasonable 4 kilobytes. Users of should delete and reinstall the app, to refresh the system caches for the URL association file.

However, is not the only case of a developer misusing the API, so people who continue to experience bugs will also find that they have other apps installed on the system which are also registering thousands of URLs. Unfortunately, it is practically impossible to find out which apps are the misdemeanours. In terms of high-profile cases, we have heard that Wikipedia and Eat 24 are among the apps registering too many domains in their universal link directory. Sources tell us that Apple is working with high-profile developers to help them understand and better use the universal links APIs. The forthcoming software update will presumably let iOS better handle huge payloads files, rather than just crashing on the spot.

Even if you do eradicate all the apps which have bad manifests, there is still an iOS system cache to overcome (this cache means that even if you uninstall the offending app, the ‘bad’ code sticks around for a while). There is a potential how-to-fix posted on the Infinite Diaries blog, which involves a lot of hoop jumping to force the iPhone and iPad to reset its cache. Users who are really frustrated can follow the method through, if the believe they have removed all the apps that caused the problem in the first place.

Apple did not say when it expects to release the software update, other than ‘soon’. As it is an issue affecting so many people (and disrupting a rather major activity people do on iPhones and iPads, tap links) however, it would not be a surprise to expect a bug fix within a few days.

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