Is a 'Send security reports' notification legitimate? Note 4, 6.0.1 Samsung Galaxy Note 4 (Verizon SM-N910V), Android 6.0.1

After a sudden reboot, my phone displayed a few system notifications in Chinese, and is now displaying a new notification (screenshot attached). The weird header alignment and a few typos ['Samsungs'; 'MMC(Mobile Country Code)'] put me ill at ease, and Googling this service from Samsung doesn't turn anything up.

Also, after this reboot a few details are off:


The lock screen background changed to one of the Android defaults (I had a plain black background)
The font reverted to the default size (I had it set to small)
The settings buttons (screen rotation, data, etc.) in the pulldown menu changed order
The interface seems more responsive


What does this mean? I shut off the device and am going to talk to Verizon, but I'm hoping people here might have some ideas.

My phone occasionally reboots for no reason (every couple of weeks), but I am not sure this is related. I haven't seen these symptoms before and Googling didn't turn up anything quickly.

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Id go call Samsung from a different phone if your scared to use it. i know Samsung can make screenshots and ask to send a report. Samsung is also made in Korea so that maybe Korean characters you see.  i wouldnt be to worried glitches happen.