My S7 Edge hang last night with only facebook apps running....the display is on, but all other functions freezes, touch screen, all buttons, all cannot use, tried to call the number straight goes into message

Battery status at 41%, so decided to leave it untill battery drained off, however after like 90 minutes, it came back to life with battery status 33%

I switched it off and charge the battery to full, this morning seem fine....

Anyone experience this?

Tried that, but the buttons aren't functioning