Phone shutting down after bump

As of a couple days ago, my Note8 has been completely powering down with even the slightest bump.

Sometimes it won't fully shut down though and recovers from a blank screen (as if it had shut down).

I haven't found really any info on this online and wondered if anyone had any ideas before I start taking it apart and (trying) to fix it.

I don't wanna end up buying a replacement battery or anything if that's not going to fix it and it would look like the phone was gubbed (though I hope not).

So if anyone has any ideas please let me know!