Audio bug on Firefox

(vou postar em inglês porque vou fazer crosspost, mas no @Linux Brasil pode responder em português)

After recently Firefox update I noticed that audios are cluncky. I mean, if my Firefox isn't playing any sound, if I start a video or any sound start playing (whatsapp notification, for example) it doesn't work at first. For example in videos, I have to pause and unpause the video to the audio start playing properly.

Is anyone experiencing something similar?

Is there anything I can do to solve this issue?

I tried another browsers and another sounds in OS and it doesn't happen, what makes me think it's not an OS bug, but a Firefox bug.