iPhone 17 Telephone changes randomly when ever I move it, set it down, pick it up, etc.

Forgive my phone ignorance. I honestly do not recall all of the movement related issues I've had with this phone. There have been a great deal of them. Last night, I performed a search using Safari. Located a video, which was from YouTube, which I have the app. Opened and began watching the video normally on the phone. I moved to a different position, and sat in a different location. At that time I gently set the phone next to me on a chair, this caused the video to stop and the phone closed the YouTube app. When I picked up the phone, I had to click upon the video again, back in Safari which led me back again to YouTube. Moments later, while watching said video, I was placing the phone upon my desk right next to me - where I could still watch the screen, the video stopped again, I cannot recall exactly the outcome, except that it took further similar procedures to correct it. I have owned several iPhones over the years, but I never had one that was so sensitive - or that could switch to a different function without any request - but merely with a very small amount of movement in nearly any axis or dimension. Perhaps this is a necessary function for children's video games - I do not know. I was hoping there was a setting that I could modify to stop this from happening. The only thing I've found so far from the internet, was changing the orientation lock - which I would prefer not to do.

This phone has so, so, many strange glitches. Nothing like some of my older iPhones. I won't get in to all of those now. Hoping that someone would give me a helpful hint to solve this issue ASAP.