Auto voiceover "reverb" effect after releasing material on TikTok

I’ve noticed that sometimes when I post a video where I speak on TikTok, my voice sounds slightly robotic, as if there’s a reverb effect or like two layers of audio are playing at once. I’ve also heard this in some other creators’ videos.

It seems to me it might be related to the background music being used.

Has anyone else experienced this and knows how to avoid it?