Fade in volume probelm

Recently, when I upload videos to TikTok, for some reason, the volume starts low, like a fade-in, for the first 2-3 seconds, and it impacts my page. This happened after I un-installed TikTok last week. I do my editing on CapCut, and I checked it before uploading with different phones and accounts. Still, the uploaded volume drops and then levels out. Has anyone else experienced this?