A few months now attaching photos to ANY messaging app I have (Threema, Viber, Slack to name a few). Weirdly, problem appears greater with freshly taken photos. If they are shared from the Gallery app, the process simply takes minutes or fails. If I try to attach a photo from these apps the photo thumbnails selection shown includes proper thumbnails of older photos but black squares for the fresh ones, and it takes minutes for them to appear. Installing updates and restarting the phone does NOT help, the problem keeps coming back.
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