Hi, does anybody know what this is, sometimes when i add media it gets weird lines at the end of the audio track, when it's played it's like a static type noise. I think it is after i add a crossfade but not sure

removing that file on the left with the lines then reimporting it clears it up, the lines disappear & adding a crossfade doesn't recreate them,🤷‍♂️🤷‍♂️

AVC 4k video orig created with Vegas Magix AVC not long ago, but i don't think it is media related to a particular, I only use AVC tho, & it doesn't happen all the time, 🤷‍♂️🤷‍♂️