Samsung's Galaxy S6 and S6 edge have caught a bug: missing toggles
It seems that the bug showed up in the last few days, and didn't affect any S6 units before. Its cause is not yet known, though the latest Android 5.1.1 update might have something to do with all this.
Samsung Mobile Arabia has it that the company is "working on the issue", and advises affected users to backup their data and then format their handsets in order to fix the problem. Multiple Galaxy S6 owners are reporting that this does indeed bring back the missing toggles.
Hopefully, it won't be long until Samsung manages to fix this unusual bug. Do you have a Galaxy S6 or S6 edge? If yes, are all your quick settings toggles where they should be?
sources: Twitter, XDA, Android Central Forums via Android Police, GSM Arena