Xda-Developers | Huawei says a bug caused EMUI to delete pictures saved from Twitter
Earlier this week, a story made the rounds about Huawei deleting images downloaded from the Twitter app. Several users were able to replicate this issue in this thread on the Android subreddit, which is where the issue was first spotted. Basically, the user downloads an image from the Twitter app and a notification from "Huawei System Services" immediately pops up and says "Twitter has deleted a photo from Gallery." Needless to say, users were pretty freaked out about this. The company has finally released a statement on the situation.
Having investigated the issue, Huawei has discovered that whenever users of certain devices download an image using specific builds of the Twitter app (version 7.78.0 and 7.77.0), the app will automatically create a folder of the same name as the image and promptly delete it in the background. This action triggers Huawei's built-in image protection alert, causing the system to notify the user of the deletion. However, the images are not affected. Users may find their images at the following location: File Manager/picture/Twitter.
People were worried that Huawei was intentionally blocking users from downloading images through some sort of backdoor. It sounds more like this is simply a very strange bug. Neither Huawei nor Twitter is deleting the images. They are in fact safe in the Twitter folder, but the way the app handles the process in the background triggered the alert. Huawei is currently talking with Twitter to resolve the issue. We don't know if it will require a system update or simply an app update. Thankfully, this issue isn't as serious as originally thought.
Note: Huawei has stopped providing official bootloader unlock codes for its devices. Therefore, the bootloader of Huawei devices can't be unlocked, which means users cannot root or install custom ROMs.
Source: TechRadar