Music Audio from overworld/creative plays. Constant unplayable lag when new chunks generate

So I had created a new test survival world to test some new features and find some new bugs to help assist! One key bug I’ve found is that when entering the nether or teleporting some blocks away the overworld or another creative theme plays as the chunks load( and sometimes take a painful amount of time to load)... and the overworld theme just persists in specific biomes such as warped forests. Another bug I’ve found is that just walking/teleporting or anything else that connotes to movement causes rather large lag spikes which eventually spike to a point where the game freezes completely and my pc needs to be reset- sometimes resulting in deletion of the world! Anyone else been experiencing similar issues! I hope I’ve helped!