When I close mac lid it shuts down the computer

  Tom Selling 18:51 16 Apr 2018

I have had my macbook pro for about 4 months. The last couple of weeks it has started shutting down for no reason after closing the lid. If I close it and open it again in 30 mins then it is ok and starts from where I left off, but if I close it and leave it for a few hours it will shut down when it should just be sleeping. I've tried a few things like resetting the SMC but still have the same issue. Any help on this would be appreciated!

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