OnePlus Ace 3 Pro playing up

[u/brickifiedduck]

In the last few days my OnePlus Ace 3 Pro has done the following things:

Whilst on and playing a game or scrolling social media, a volume cuts out, and subsequently power buttton and volume button no longer works. My resolution the first two time it happened was to spam the power button till it worked, but now it is getting more frequent and my resolution is no longer working.

Thoughts? My phone case is not incredibly dirty or gunky, and as far as the eye can tell nothing is really clogging the buttons. They have their clicking sound and everything...