I've just bought my galaxy s5 about a month ago and have been enjoying it alot. However, something very weird has happened recently. The notification light begins to flash white after a while. For example, when the phone is charging, it will be red for a while and then it will randomly switch to flashing white. Same for notifications, it will flash blue for a bit and then switch to white. Has anyone else experienced this problem and does anybody know what may be causing it?