Multiple issues came out of nowhere

Hello,

I've been using LG v20 H990ds from quite a time. I wasn't facing any issues. But lately my phone is acting weird. There are not 1 but many problems and I don't have any idea what to do. I even tried contacting LG support via email but I didn't got any response. These are the problems I'm facing.

1. When I'm watching a video (Online or Offline), playing games or doing something that doesn't require keyboard at all. Change keyboard pops up every time my phone shakes . I tried doing it...

Multiple issues came out of nowhere

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